# How long (in ns) does it take light to travel 1.00 m in vacuum? What distance does light travel in water during the time that it travels 1.00 m in vacuum?

48,783 questions
1. ## physic

How long (in ns) does it take light to travel 1.00 m in vacuum? What distance does light travel in water during the time that it travels 1.00 m in vacuum?

asked by mary on January 28, 2010
2. ## Astronomy

Few question about astronomy: 1.how many centimetres is equivalent to a light-nanosecond 2. How long is an astronomical unit (AU) in light-minutes (1min, i.e., the distance that light travels in a vacuum in one minute)? Please show the calculation if there

asked by KD on September 13, 2011

A spot of light is made to travel across a computer screen in a straight line so that, a t seconds after starting, it's distance from the left hand edge (d cm) is given by the function d(t) =7t - t² +2. Find the furthest distance the spot light travels

asked by very urgent, need this today on November 18, 2016
4. ## MATH

A light year is the distance that a light travels through a vacuum (space without matter) in one year. A light year is about 9.46 x 10^12km. The distance to the spiral galaxy NGC 4603 is about 1.08 x 10^8 light years. What is the distance in km?

asked by Maria on March 31, 2011
5. ## Math>>>>if anyone could check my answer

this problem is difficutl for me i have an answer but im unsure so if someone could check my answer please. heres my problem: A light year is the distance that a light travels through a vacuum (space without matter) in one year. A light year is about 9.46

asked by Angel on March 31, 2011
6. ## physics

Fiber Optic Distances When light rays travel down optical fibers, they don't follow a perfectly straight path. That means the light has to cover a little extra distance compared to the straight-line distance from one end of the fiber to the other. Suppose

asked by Anonymous on November 25, 2013
7. ## physics

Fiber Optic Distances When light rays travel down optical fibers, they don't follow a perfectly straight path. That means the light has to cover a little extra distance compared to the straight-line distance from one end of the fiber to the other. Suppose

asked by Anonymous on November 25, 2013

The nearest star beyond the sun is Alpha Centauri, 4.2 x 1016 meters away. If we received a radio message from the star today, how long ago would it have been sent? The distance that light travels in a vacuum in one year, approximately 9.46 trillion (9.46

9. ## chemistry

How long does it take light to travel each of the following distances 2462 mi, the distance between Los Angeles and New York. How do we calculate how fast light travels?

asked by Luis on October 13, 2014
10. ## physics

Sound does not travel through a vacuum. How do we know that light does? Explain how you can see ordinary nonluminous classroom objects. Light? Through what medium does starlight reach us? We see nonluminous objects mainly with reflected light.

asked by Ron on March 4, 2007
11. ## physics

A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 46.05°. Inside the diamond, red light (ë = 660.00 nm in vacuum) is refracted at 17.38° with respect to the normal; blue light (ë = 470.00 nm in vacuum)

asked by ryan on May 4, 2014

A mixture of red light (vacuum = 661 nm) and green light (vacuum = 551 nm) shines perpendicularly on a soap film (n = 1.35) that has air on either side. What is the minimum nonzero thickness of the film, so that destructive interference causes it to look

asked by Mary on November 13, 2007
13. ## chemistry

1. Calcuate the distance(km) from the Earth to the Moon if it takes light 1.3 seconds to make the trip? 2. Saturn is about 1.2 billionkm from Earth. How long does it take light to travel that distance? (I was only given the wave equation, Max Plancks

asked by Brooke N on November 11, 2015
14. ## physics

Help me with this problem i do not get it? A light wave can travel the earth to the moon in 1.3 s. the distance to the moon is 384,790 km. how long would it take a sound wave to travel the same distance at 343 m/s? state you answer in days. I got 2 days

asked by susan on December 1, 2011
15. ## physics

Question Part Points Submissions Used 1 2 3 4 0/0.37 0/0.37 –/0.37 –/0.37 4/15 1/15 0/15 0/15 Total 0/1.48 ...A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 46.05°. Inside the diamond, red light

asked by ryan on May 4, 2014
16. ## physics!

Late one night on a highway, a car speeds by you and fades into the distance. Under these conditions the pupils of your eyes have diameters of about 7.0 mm. The taillights of this car are separated by a distance of 1.2 m and emit red light (wavelength =

asked by Ashley on May 7, 2013
17. ## Physics

it is estimated that light travels 100 000 years to travel the full distance across our galaxy, the milky way. If light travels 3.0x10^8 m every second, how long is the Milky Way? (1year=3.2x10^7s)

asked by Hafiza on September 25, 2012

in physics terms what does vacuum mean?? i thought they meant a vacuum sweeper?? huh? The question is " The same object is dropped in a vacuum and then in air. Whaich of the parameters( distance,velocity,acceleration) vary and which remain constant during

asked by bobbi on November 8, 2010
19. ## Physics

Find the speed of light in flint glass if the index of refraction is n=1.66. How much slower in percent of speed of light in a vacuum c does the light move in each of this medium? v=c/n v=3x10^8m/s/1.66 =1.8x10^8m/s For the percent of speed of light in a

asked by Andrea on April 16, 2008
20. ## Math

Every moment of every day, light pours out from the Sun at the center of our solar system and travels to Earth. It does not arrive at Earth instantaneously though; it takes time to get here. Your task is to figure out how long it takes for light to travel

asked by Danielle on February 18, 2014
21. ## physics

Horizontal rays of red light (λ = 660 nm, in vacuum) and violet light (λ = 410 nm, in vacuum) are incident on the flint-glass prism shown in the drawing. The indices of refraction for the red and violet light are nred = 1.662 and nviolet = 1.698. The

asked by Anonymous on April 10, 2014
22. ## maths

If the speed of light is 3x10^8m/s and the distance around the earth is 4.5x10^4 km and a plane could travel at half a speed of light, how long would it take for the plane to fly around the earth twice?

asked by Anonymous on January 6, 2016
23. ## physics

An interstellar ship has a mass of 1.20 X10^6 kg and is initially at rest relative to a star system. a) what constant acceleration is needed to ring the ship up to a speed of .10c (where c is the speed of light, 3.0X10^8 m/s) relative to the star system in

asked by Dee on November 26, 2006
24. ## Chemistry

How would I figure out how far the distance in kilometers between the sun and earth be if it takes 8.3 minutes for light to travel? (Light travels at 3.00 x 10^8)

asked by Luna on October 10, 2017
25. ## Physical Sci

An incandescent light bulb produces light when electrons flow through the (1 point) * air. * glass. * filament. * vacuum. 2. Many streets and parking lots are illuminated with (1 point) * laser lights. * tungsten-halogen lights. * sodium-vapor lights. *

asked by Roses on April 18, 2018
26. ## math

a light year is the distance light travels in one year. one light year is about 5.9x10^12 mi. If it takes light 3 months to travel from one star to another, about how far apart are the stars? 5.9x10^12/12*3 I got 1.5x10^12 mi Is this correct?

asked by Elle on January 9, 2014
27. ## Math

If light travels 10,000 km in 3.3 x 10-2 sec, how long will it take light to travel one meter.

asked by Samantha on September 21, 2010
28. ## Astronomy

Based on what you learned about light, select all of the correct statements from the following list. The only type of electromagnetic radiation that is actually considered light is visible light. High frequency photons carry more energy than long

asked by Andy on November 9, 2011
29. ## Physics

Can anyone help me here? I have no idea where to start! Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35.1°. The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the slab

asked by Anonymous on October 12, 2015
30. ## physics

The index of refraction of water for a given monochromatic light in water is n=4/3. The wavelength of this light in water is 500nm. a) find the speed of this light in water. b) find the energy of one photon of this light . Does this enerdy change if this

asked by vicky on February 23, 2017
31. ## Physics

Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water, (iv) 670-nm-wavelength light

asked by Cassie on February 2, 2013
32. ## 6th math

Light travels at 186,000 miles per second. Light takes about 11⁄3 seconds to travel from the earth to the moon. Calculate the distance between the earth and the moon based on the speed of light. ???

asked by princessleaya on November 13, 2017

Can you please explain your answer. How did you get blue lamda. Is it because red and green makes blue? How do I find the value of blue lambda? A mixture of red light (vacuum = 661 nm) and green light (vacuum = 551 nm) shines perpendicularly on a soap film

asked by Mary on November 14, 2007
34. ## Physics

Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35.1°. The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the slab is 21.1°, the angle of refraction for the light

asked by Anonymous on October 6, 2015
35. ## Electricity

How long will it take to? 500 kms of wire, 1 curcuit breaker at one end and light at the other end. How long will it take, once the breaker is on for the electricity to travel 500kms to turn the light on.

asked by Kevin on August 6, 2010
36. ## Algebra

Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88*10^12 miles. Suppose a star is 3.2*10^12 light-years from Earth. In scientific notation, approximately how many

asked by Anonymous on April 12, 2017
37. ## Science

The Milky Way has a radius of approximately 100,000 light years. How many miles is that? How long would it take you to travel across our galaxy if you were traveling at 50% the speed of light (show work)?

asked by Harold on November 19, 2013
38. ## Algebra

Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 *10^12 miles. Suppose a star is 3.2 * 10^2 light-years from Earth. In scientific notation, approximately how many

asked by Evelyn on March 12, 2017
39. ## Algebra

Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 *10^12 miles. Suppose a star is 3.2 * 10^2 light-years from Earth. In scientific notation, approximately how many

asked by Justus on April 19, 2017
40. ## algebra

Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 *10^12 miles. Suppose a star is 3.2 * 10^2 light-years from Earth. In scientific notation, approximately how many

asked by Lost on February 10, 2017
41. ## Chem

The space probe Pioneer 11 was launched April 5,1973, and reached Jupiter in December 1974 traveling a distance of 998 million km. How long did it take an electromagnectic signal to travel to earth from Pioneer 11 when it was near Jupiter. The speed of

asked by Lauren on November 3, 2007
42. ## physic

Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How far is Earth from the sun? 3. In Major League Baseball,

asked by ray on November 3, 2011
43. ## physics

The index of refraction of water for a given monochromatic light in water is n=4/3. The wavelength of this light in water is 500nm.  a) find the speed of this light in water.  b) find the energy of one photon of this light . Does this energy change if

asked by vicky on February 23, 2017
44. ## Chemistry

the distance from the sun to earth is 1.496 x10 ^8 km. how long does it take light to travel from the sun to earth How do you solve this?

asked by Mark on October 25, 2015
45. ## Physics

A 15.0 m long truck traveling at 40.0 mph has a braking capability of 5.00 m/s2 from this speed. It is approaching a 10.0-m wide intersection with a traffic light that is turning yellow. (a) What is the minimum distance the truck can be from the

asked by Help Me on January 23, 2013
46. ## Math/algebra

14. Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88x10 miles. Suppose a star is 2 23x 10 light- years from Earth. In scientific notation, approximately how many

47. ## Physics

Monochromatic light (vacuum = 661 nm) shines on a soap film (n = 1.33) that has air on either side of it. The light strikes the film perpendicularly. What is the minimum thickness of the film for which constructive interference causes it to look bright in

asked by Anon on October 7, 2019
48. ## Math! Algebra 1!

A boat is traveling in a river with a current that has a speed of 1.5 km/h. In one hour, the boat can travel twice the distance downstream as it can travel upstream. How long will it take the boat to travel 100 km in still water?

asked by Dede on November 10, 2014
49. ## physic

Block _____ Name ________________________________________ Date __________ Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light

asked by Anonymous on November 3, 2011
50. ## physics

In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. The distance to Alpha Centauri, the closest star other than our own sun that can be seen by the naked eye, is 4.7 light-years. Express

asked by rick on March 3, 2008
51. ## physics

i figured out the ratio its 1.10 , don't know how to get the second part please help!! my understanding is not good enough to answer part 2 Pretend you have two containers, one filled with ethyl alcohol and the other filled with benzene. How would you show

52. ## Astronomy

Light travels at a constant speed of 3.0 x 105km/s. The distance between the Sun and the Earth is about 1.5 x 108km. Use the distance = speed x time formula (d = v t) to calculate the time it takes light to travel from the Sun to the Earth. Show your work.

asked by Lilly on March 15, 2014
53. ## Astronomy

Light travels at a constant speed of 3.0 x 105km/s. The distance between the Sun and the Earth is about 1.5 x 108km. Use the distance = speed x time formula (d = v t) to calculate the time it takes light to travel from the Sun to the Earth. Show your work.

asked by Lilly on March 15, 2014
54. ## Physics

Hello, can someone please check my answers and tell me if they are correct? 1. A laser produces a pulse of light with a speed of 300000000m/s in vacuum in a time 1.70x10^-15s. a) what is the length of the pulse? b) The pulse travels into a piece of glass

55. ## Algebra

Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 × 10*12 miles. Suppose a star is 9.8 × 10^1 light-years from Earth. In scientific notation, approximately how many

asked by Kaai97 on March 2, 2016
56. ## algebra

The light intensity of a light bulb varies inversely as the square of the distance from the light bulb. The function I(d) =   k/d^2 models this situation, where I is the light intensity, d is the distance from a light source, and k is a constant. If

asked by Nate on February 5, 2018
57. ## science

How do the speeds of light waves and sound waves compare? Sound waves can travel faster depending on the medium. Sound waves always travel faster than light waves.**** Light waves travel at the same speed as sound waves. Light waves travel about 1 million

asked by noodles on April 10, 2019
58. ## Stars and the Galaxies

if alpha centauri were to all of a sudden disappear, we wouldn't knknow 4 another 4.3 years. How come? Why would this be the case? would this be the case because its really far away from us and it's 4.3 light years away. So if it suddenly just vanished out

asked by Sara on March 4, 2010
59. ## Chemistry

The velocity of light is 1.86 × 108 mi/hr. The distance of Mercury from the Sun is approximately 5.78 × 107 km. How many minutes will it take for light from the Sun to travel to Mercury?

asked by Ang on February 3, 2011
60. ## Physics

Light travels at a speed 3x10^8 m/s. What distance does it travel in a time of 0.1s?

asked by Sheila on August 24, 2012
61. ## Physics

light travels at a constant speed of 3x10*11 cm/sec. how long does it take light to reach the earth a distance of 1.5x10*8 km. give the answers in seconds and minutes.

asked by Dan on October 16, 2011
62. ## physics

light travels at a constant speed of 3x10^11 cm /sec how long does it take light to reach the earth a distance of 1.5x10^8 km give your answer in seconds and minutes.

asked by Helppppp on October 17, 2011
63. ## pre-algebra

A) light travels at approximately 186,000 miles per second. approximately how far will it travel in 1 minute? express your answer in scientific notation B) the sun is approximately 93,000,000 miles from the earth. about how long does it take light to

asked by Extra homework on November 13, 2008
64. ## physics

Calculate the frequency in hertz, wavelength in nm, and the velocity in m/s of light inside a material with a refractive index of 1.39. In vacuum, the light has a wavelength of 514.5nm

asked by noel on April 5, 2011
65. ## math

Mercury is 5.79 x 10^7 km from the sun. Light travels at a speed of 3.0 x 10^5 km/s. How long would it take for light to travel from the sun to Mercury? I have to answer this problem using scientific notation.

asked by Susan on September 26, 2011
66. ## physics

Can a person, in principle, travel from Earth to the galactic center (which is about 2.3e4 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 24 y what distance

asked by Andy on April 15, 2010
67. ## Physics

Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light

asked by Blah on October 19, 2012
68. ## math

can someone please help me i am lost. S this is kind of like your problems i can help you and you can help me *** the speed of the light in a vacuum is 299,792,458 meter per second which number, written in scientific notation, is the best approximation of

asked by jas on April 5, 2018
69. ## Chemistry

In one second light can travel 2.998x10^8m. How many inches does light travel in one femtosecond?

asked by Anonymous on September 3, 2009
70. ## science

what combination of mediums will produce a stright line of light? how do you correct for hyperopia? how do you correct for myopia? what kind of people have an astigmatism? what part of the eye act as a lens and what part acts as a screen? how do different

asked by lily on March 3, 2013
71. ## physics

How long does it take light to travel through a 2.7 mm-thick piece of window glass?

asked by joe on May 19, 2013
72. ## physics

How long does it take light to travel through a 3.3 mm-thick piece of window glass?

asked by mike on January 30, 2013
73. ## physics

light travels at a constant speed of 3x10^11 centimeters/sec. how long does it take light to reach the earth a distance of 1.5x10^8 kilometers give your answer in seconds and minutes.

asked by help on October 15, 2011
74. ## Physics

1) How much longer would it take for light to travel through 1.0 km of water than 1.0 km of air? What formula do you use? The answer is 1.1 x 10^-6 s 2) The acetate roll on overhead projector is placed at a distance 1.2f from the lens. (where f is the

asked by anonymous on June 17, 2012
75. ## HELP MEH PLS

Marie and Pierre Curie coined which term to describe the ability of certain elements to give off radiation spontaneously? AM signals travel as changes in ____ Why does the wave of light bend toward the normal as it enters water? The Curies discovered which

asked by Who am I? That's a secret I'll never tell. You kno on April 1, 2015
76. ## Science-Chemistry

How would I figure out how far the distance in kilometers between the sun and earth be if it takes 8.3 minutes for light to travel?

asked by Bagel on October 10, 2017

A) light travels at approximately 186,000 miles per second. approximately how far will it travel in 1 minute? express your answer in scientific notation B) the sun is approximately 93,000,000 miles from the earth. about how long does it take light to

78. ## scientific notation?

A) light travels at approximately 186,000 miles per second. approximately how far will it travel in 1 minute? express your answer in scientific notation B) the sun is approximately 93,000,000 miles from the earth. about how long does it take light to

79. ## my pre-algebra questions

A) light travels at approximately 186,000 miles per second. approximately how far will it travel in 1 minute? express your answer in scientific notation B) the sun is approximately 93,000,000 miles from the earth. about how long does it take light to

80. ## Physics,,,,,,,How do I solve this?

Red light always has a lower frequency than blue light. (a) In a vacuum, these two colors are known to travel at the same speed. How do their wavelengths compare in vacuum? Choose one answer only. wavelength of blue > wavelength of red wavelength of red =

asked by Shae on March 3, 2018
81. ## physics

How long does it take light to travel through a 3.2mm -thick piece of window glass?

asked by Paige on October 23, 2011
82. ## Chemistry

If the light travel 3.0 times 10 to the power of 8 meters/secs. How long it will take in miles/hr

asked by Laura on July 15, 2010
83. ## Physics

Can a person, in principle, travel from Earth to the galactic center (which is about 2.30×104 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 26 y what

asked by Leonidas on April 8, 2010
84. ## physics relativity

An observer on Earth sees you travel 1000 m at half the speed of light. What distance do you think that you travelled?

asked by Jackson on May 25, 2017
85. ## Physics

An observer on Earth sees you travel 1000 m at half the speed of light. What distance do you think that you travelled?

asked by Junior on May 10, 2017
86. ## MATH

Is there a shorter way to answer this question? Radio waves ina vacuum travel a distance equal to seven times the circumference of earth in 1 s. If the radius of Earth is 6 318 138.7m, what is the speed of the radio waves in kilometres per hour?

asked by Anonymous on September 15, 2010
87. ## PHYSICS PLLZ HELP

1- wave velocity is related to a- period b-wavelength c-amplitude d-all of these 2- wave amplitude is related to a- wave velocity b- frequency c- energy d-wave length 3-which of the following radiation has te smallest frequency? a- infrared b- visible c-

asked by FRANK on April 14, 2009
88. ## Physics

How long would it take for a beam of light to travel around the earth in an ideal fiber-optic cable?

asked by Charles on February 18, 2008
89. ## science

the distance from the earth to the moon is 240000 miles. if the speed of light is 2.998 x 10^8 meters per second, how long does it take for light reflected from the moon to reach our planet?

asked by Paco on October 29, 2012
90. ## Physics

A modern computer central processing unit chip (CPU) runs with a clock speed of 2.7 GHz. It can execute one operation in each of these clock cycles. (a) how many seconds long is one clock cycle? (b) Electrical signals travel at the speed of light How far

asked by Phil on April 6, 2017
91. ## Math

Simplify the expression. (-4)^-6(-4)^-7 My answer: -4 Simplify and give the answer in scientific notation. (5 X 10^6((3 X 10^5) My answer: 1.5 X 10^12 (3 X 10^6)(8 X 10^-4) My answer: 2.4 X 10^3 Astronomers measure large distances in light-years. One

asked by Anonymous on February 6, 2014
92. ## Science Help

1.) A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10-2 s, but in that time it goes from rest to a velocity of 4.00×103 m/s.

asked by Kenny on October 18, 2014
93. ## Physics

Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other. The light waves are out of phase with each other. The light

asked by Brian on May 10, 2015
94. ## physiiics

Which of the following is correct for the two coherent light waves to produce zero light? The light waves should travel in perpendicular directions. The light waves are in phase with each other The light waves are out of phase with each other. The light

asked by ooommgggg on February 11, 2013
95. ## Math

the intensity l of light from a light bulb, measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb. Suppose l is 70 w/m^2 when the distance is 5m. Find the intensity when the distance from the light

asked by Kalyn on August 7, 2015
96. ## math

The intensity of I of light from a light bulb, measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb. Suppose I is 85 w/m^2 when the distance is 5m. Find the intensity when the distance from the

asked by destiny on July 24, 2015
97. ## physics

Assume that the dots in the painting are separated by 1.0 mm and that the wavelength of the light is vacuum= 500 nm. Find the distance at which the dots can just be resolved by (a) the eye and (b) the camera. I know that the resolving equation is

asked by Anonymous on April 23, 2014
98. ## science

Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up