light is an electromagnetic wave and travels at a speed of 3.00 x 108 m/s. the human eye is most sensitive to yellow-green light which has a wavelength of 5.45 x 10-7 m. what is the frequency of this light?

40,243 results
  1. Science

    What is the main difference between mechanical and electromagnetic waves? A. Mechanical weaves involved transfers energy; electromagnetic waves do not B. Mechanical waves require a medium to travel in; electromagnetic waves do not***** C. mechanical waves

  2. Science Help Plzz

    1. The images above show particles in a medium. Which of the following shows the worst conditions for a sound wave travel? A B C D is the answer A? Which of the following correctly describes a radio wave? A long wavelength and high frequency B long

  3. Physics

    Which of the following experiments confirms that light behaves in a wave like manner? When light has it's frequency adjusted, the speed of the light changes. When light is given more energy, it is brighter. When light is sent through a series of mirrors,

  4. Science

    Determine the frequency of a microwave 6.0 cm in length.( A microwave is an electromagnetic wave.It travels through space at a speed of 3.0 x 10 ^8 m/s)

  5. Science HW - - - check my answers?

    1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B 2. Which waves have the longest wavelength and lowest

  6. PHYSICS

    Light waves are electromagnetic waves that travel at 3.00 108 m/s. The eye is most sensitive to light having a wavelength of 5.50 10-7 m. (a) Find the frequency of this light wave. __________ Hz (b) Find its period. _______________ s

  7. physics

    The speed of all electromagnetic waves in empty space is 3.00 × 108 m/s. What is the wavelength of visible light emitted at 7.2 × 108 MHz? Answer in units of m

  8. Physical Science

    1. A wave has a wavelength of 10 mm and a frequency of 5.0 hertz. What is its speed? A. 50 mm/s B. 50 hertz/s C. 2.0 mm/s D. 0.50 mm/s 2. Which type of mechanical wave needs a source of energy to produce it? A. a transverse wave B. a longitudinal wave C. a

  9. Science

    1.The images above show particles in a medium. Which of the following shows the worst conditions for a sound wave to travel? A B C D 2.Which of the following correctly describes a radio wave? A.long wavelength and high frequency B.long wavelength and low

  10. physics question

    What factors affect the frequency of a wave? A. the amplitude B. the energy of the wave C. the wavelength of the wave D. the material through which it travels E. the velocity of the wave I said C,D, and E. Should there be anything else?

  11. Science

    Which choice correctly describes a characteristic of an electromagnetic wave? a)An electromagnetic wave moves at the speed of sound. b)An electromagnetic wave in a vacuum moves slightly slower than the speed of light in a vacuum. c)An electromagnetic wave

  12. Science

    I have several questions 4: The image above shows particles in a medium. Which of the following shows the best conditions for a sound wave to travel? a, b, c, d----My answer is C 12. Which letter shows the type of wave that can be seen by the human eye? a.

  13. science

    A radio wave travels through space with a frequency of 2 x 104 Hz. If the speed of the radio wave is 3 x 108 m/s, what is the wavelength of this wave? A. 6.7 x 10-4 m B. 6 x 1012 m C. 1 x 104 m D. 1.5 x 104 m

  14. physics

    The electromagnetic _____________ is the range of all possible frequencies of electromagnetic radiation. A common name for the electromagnetic radiation that humans can see is ______________ light. What humans call white light is actually made up of all of

  15. physics

    light is an electromagnetic wave and travels at a speed of 3.00 x 108 m/s. the human eye is most sensitive to yellow-green light which has a wavelength of 5.45 x 10-7 m. what is the frequency of this light?

  16. Physical Science 8th Grade

    1. What is the resulting direction of a surface wave? Is it perpendicular, parallel, opposite, or circular? 2. What happens when a mechanical wave travels through a medium? What is transferred - mass, particles, energy, or waves? 3. Which of these waves

  17. Physics

    Which of the following experiments confirms that light behaves in a wave like manner? a)When light has it's frequency adjusted, the speed of the light changes b)When light is given more energy, it is brighter c)When light is sent through a series of

  18. science

    A string is waved up and down to create a wave pattern with a wavelength of 0.5 m. If the waves are generated with a frequency of 2 Hz, what is the speed of the wave that travels through the string to the other end? The speed of the wave is __ m/s.

  19. Intergarted Science

    I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with

  20. physics

    A sound wave travels in air at a frequency of 500 Hz. If part of the wave travels from air into water, does its frequency change? Does its wavelength change? Note that the speed of sound in air is about 340 m/s, whereas the speed of osund in water is about

  21. Physics

    What is the speed of an electromagnetic wave that has a frequency of 7.8 x 10^6 Hz? How would I solve this problem?

  22. Physics

    What is the ratio of the wavelength of visible light of wavelength600 nm to that of an FM radio wave of frequency 100 MHz? c = 2.998x 108 m/s

  23. Physics

    Light is an electromagnetic wave and travels at a speed of 3.00 108 m/s. The human eye is most sensitive to yellow-green light, which has a wavelength of 5.58 10-7 m. What is the frequency of this light? Ever heard of the equation (wavelength) x

  24. science

    Light waves are traveling through glass. If the wavelength of some part of the light wave is 4 x 10-7 m and the frequency of that light is 5 x 1014 Hz, what is the speed of light through the glass? 8 x 10-22 m/s 1 x 107 m/s 1.25 x 1021 m/s 2 x 108 m/s

  25. Chemistry

    A lightyear is a unit of length equal to the distance that light travels in 1 year. What is 1 lightyear expressed in units of meters? The speed of light is 3.00 × 108 m/s.

  26. Chris

    Where is energy stored in electromagnetic waves? A. In the wave’s moving atoms B. In the oscillating electric and magnetic fields C. In the electromagnetic force D. In the wave’s directional vector

  27. physics

    Use the fact that the speed of light in a vacuum is about 3.00 108 m/s to determine how many kilometers a pulse from a laser beam travels in exactly 4.9 hour(s)

  28. science

    When you go out into the sun, the UV light can give you a tan. UV light has a frequency of 7.89 x 1014 Hz. What is the wavelength of UV light? Please use 3 x 108 m/s for the speed of light (c). You will need to upload a file to show how to solve this

  29. Math

    The speed of an ocean wave is measured by an oceanographer.the wave travels 30 meters in 10 seconds. How many meters will the wave travel in 2 minutes

  30. Pyshics

    The wavelength of light visible to the human eye is on the order of 6x10^-7 m. Find the frequency of the light wave if the speed of light in air is 2.99792x10^8m/s. Answer in s^-1

  31. physics

    A sound wave in air has a frequency of 262 Hz and travels with a speed of 349 m/s. How far apart are the wave crests (compressions)

  32. physics

    Green light has a wavelength of 4.96 10-7 m and travels through the air at a speed of 3.00 108 m/s. Calculate the period of green light waves with this wavelength. s What is the frequency? Hz

  33. lOTS OF PHYSICS :)

    41. Is the speed of light constant as it passes through transparent materials? Yes, the speed of is always constant No, light travels at different speeds through different materials 42. A lens that causes light to diverge is A converging lens A diverging

  34. physics

    A sinusoidal transverse wave of amplitude ym = 3.2 cm and wavelength = 3.4 cm travels on a stretched cord. Find the ratio of the maximum particle speed (the speed with which a single particle in the cord moves transverse to the wave) to the wave speed.

  35. physics

    the relationship bwtween frequency, wavelength, and speed holds for light waves because all forms of electromagnetic radiation travel at a single speed in a vaccum. is this true?? or do different forms of electromagnetic radiation travel at different

  36. science

    1. The images above show particles in a medium. Which of the following shows the worst conditions for a sound wave travel? A B C D is the answer A? Which of the following correctly describes a radio wave? A long wavelength and high frequency B long

  37. physics

    If the speed of light through material Z is 2.5×108 m/s, what is this material’s index of refraction? The speed of light in a vacuum is 3 × 108 m/s.

  38. Physics

    A stationary particle of charge q = 1.4 10-8 C is placed in a laser beam (an electromagnetic wave) whose intensity is 3.5 103 W/m2. Determine the magnitudes of the (a) electric and (b) magnetic forces exerted on the charge. If the charge is moving at a

  39. 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-

  40. physics

    A certain spaceship has a speed of 18200 mi/hr. What is its speed in light-years/century? A light-year is the distance that light travels in one year with a speed of 186,000 mi/s.

  41. 8th grade science

    I'm not sure what's the correct answer: 9)Which of these characteristics can only be attributed to a wave of red light? A)The energy of the wave travels in the same direction as the wave travels. B)The wave travels by vibrating the particles of the medium

  42. Physics doppler effect

    A radar device emits microwaves with a frequency of 4.73E+9 Hz. When the waves are reflected from a van moving directly away from the emitter, the beat frequency between the source wave and the reflected wave is 751 beats per second. What is the speed of

  43. physics

    Light travels at a speed of about 3.0 108 m/s. (a) How many miles does a pulse of light travel in a time interval of 0.1 s, which is about the blink of an eye?

  44. science

    15. How does convection transfer heat throughout Earth’s surface and interior? (1 point) Heat and pressure build up over time in the Earth’s core. Heat cycles through liquid magma currents in the mantle. Heat from the sun reaches Earth in the form of

  45. Physics HELP!!

    a). What is the wavelengh of a 2.54MHz ultrasound wave travelling through aluminum?(the speed of sound in aluminum is 6420 m/s) b). What frequency of electromagnetic wave would have the same wavelength as the ultrasound wave above?

  46. Waves (Physics)

    I have trouble with these 2 problems, can anyone assist me to answer them? 18) What is the speed of a periodic wave disturbance that has a frequency of 3.50 Hz and a wavelength of 0.700 m? 21) A periodic longitudinal wave that has a frequency of 20.0 Hz

  47. physics

    A sinusoidal transverse wave of amplitude ym = 6.4 cm and wavelength = 5.2 cm travels on a stretched cord. Find the ratio of the maximum particle speed (the speed with which a single particle in the cord moves transverse to the wave) to the wave speed.

  48. Physical Science

    Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light is A. a stream of particles. B. a wave. C. heat.

  49. Physics

    When light travels from air to glass, which one of the following is not dependent on the index of refraction of the glass? A- The speed at which lught travels in the glass B- The angle through which light is deflected on entering the glass C- The frequency

  50. physics

    The speed of light in a certain material is 1.6 × 108 m/s. Express the speed of light in (a) feet per nanosecond (ft/ns) and (b) millimeters per picosecond (mm/ps).

  51. Physics

    A sound wave in air has a frequency of 240 Hz and travels with a speed of 334.7 m/s. How far apart are the wave crests (compressions)?

  52. physics

    A speeding car is pulling away from a police car. The police car is moving at 30 m/s. The radar gun in the police car emits an electromagnetic wave with a frequency of 20.0 x 10^9 Hz. The wave reflects from the speeding car and returns to the police car

  53. Science

    I needed help with this question. I’m not sure I got it quite right. Is it correct to say that in every case, without exception, any radio wave travels faster than any sound wave? ANSWER: Yes, it is correct to say because radio waves are electromagnetic

  54. 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

  55. Physics

    What is the frequency of an electromagnetic wave if it has a wavelength of 1.4 km? The speed of light is 3 × 10 8 m

  56. Science

    1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? (1 point) a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B Is it C?

  57. physics

    Suppose the Sun is 1.52669 × 108 km from Earth. The speed of light is 2.99792 × 108 m/s. How long does it take for its light to reach us? Answer in units of min

  58. physics

    Use the fact that the speed of light in a vacuum is about 3.00 108 m/s to determine how many kilometers a pulse from a laser beam travels in exactly 4.9 hour(s)

  59. Physical Science

    1.Nico uses wire to connect a battery, light bulb, and a switch, but the light bulb doesn't light up. What might explain this problem? A.The circuit is closed B.The wires are bent C.The battery has too much power D.The switch is open. B? 2.What type of

  60. chemistry

    Which is not a true statement concerning electromagnetic radiation? It travels through space at 3.0 x 1010 cm/s. It travels in a straight line. It has the fastest speed possible in nature. The sun is a source of it.

  61. Science

    A certain type of laser emits light that has a frequency of 4.0 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.3 × 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of

  62. College Physics 2056

    An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?

  63. Physical Science

    I've answered these two questions and need someone to check them for me: 1.Describe two characterisitics that light and sound have in common. Ans- They both transfer energy [and I need help thinking of a second one] 2.Describe two ways in which light and

  64. Science

    what is an electromagnetic wave comprised of? Electromagnetic waves consist of electric and magnetic fields in which each kind of field generates the other to keep the structure propagating through empty space at the speed of light.

  65. Waves-Science

    I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with

  66. science

    A radio wave travels through space with a frequency of 2 x 104 Hz. If the speed of the radio wave is 3 x 108 m/s, what is the wavelength of this wave? 6 x 1012 m 1.5 x 104 m 1 x 104 m 6.7 x 10-4 m Can someone show me how to solve this?

  67. College Physics

    A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. a. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude? b. What is the intensity of the wave at 5 km? c. What is the

  68. Science

    What is the full formula for frequencys and wavelengths? The wavelength formula is λ = v/f where λ = wavelength of a sound wave or electromagnetic wave v = the speed of propagation of the wave, f = frequency of the wave in 1/s = Hz. c=nu*lambda c is

  69. Physical science

    A wave travels along a string at a speed of 1,5m 1s.if the frequency of the source of the wave is 7,5hz,calculate:(a)the wavelength of the wave..(b)the period of the wave

  70. Physics

    1)An electromagnetic wave is produced by: an accelerating charged particle or changing magnetic fields. 2)Find the period of an electromagnetic wave of wavelength 2.20 x 10^-2 m. 3.00 x 10^8 * 2.20 x 10^-2 = 6.60 x 10^6 s

  71. physics

    he speed of light in a vacuum is about 3.00 108 m/s how many kilometers a pulse from a laser beam travels in exactly 3.9 hours.

  72. Science

    Could someone please explain to me in a simple way how FM, AM, and XM radio signals work? No one I ask seems to know. Thanks for the help. Radio waves are part of a general class of waves known as electromagnetic waves. In essence, they are electrical and

  73. Physics

    A wave travels at a speed of 34 cm/s. It’s wavelength is 18 cm. What is the period of the wave? 0.75 s 1.2 s 0.66 s 0.53 s Regions of compression and rarefaction help define _______. Electromagnetic waves Longitudinal waves, but not transverse waves

  74. physics

    Electromagnetic radiation (light) consists of waves. More than a century ago, scientists thought that light, like other waves, required a medium (called the ether) to support its transmission. Glass, having a typical mass density of ρ = 2770 kg/m3, also

  75. physics

    Green light has a wavelength of 4.96 10-7 m and travels through the air at a speed of 3.00 108 m/s. Calculate the period of green light waves with this wavelength. s What is the frequency? Hz

  76. physics

    An earthquake wave has a wave length of 523m and travels with a speed of 4.6km through a portiin of Earths crust. a) what is its frequency? b) if it travels into a different portion of Earths crust, where its speed is 7.5km/s,what is its new wavelength?

  77. Math

    Light travels at a speed of about 186,000 miles per second. Sound travels at a speed of about 1,087 feet per second. How many times faster light travels than sound.

  78. AP Physic

    Hi there I am having a lot of trouble trying to figure out this homework problem and I really need help. This problem is dealing with wave motion and I do not know how to set up the formula to get the correct answer. Please help me and show some steps how

  79. Science, Grade 8

    Can someone tell me a little about The Wave Model of Light and The Electromagnetic Spectrum. (Who came up with the theory, etc) All help is much appreciated! Tks!!!!!

  80. physics

    If the speed of light through material Z is 2.5 × 108 m/s, what is this material’s index of refraction? The speed of light in a vacuum is 3 × 108 m/s.

  81. PHY

    A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.

  82. chemistry

    A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.

  83. oscillations

    A human wave. During sporting events within large, densely packed stadiums, spectators will send a wave (or pulse) around the stadium (Fig. below). As the wave reaches a group of spectators, they stand with a cheer and then sit. At any instant, the width w

  84. Physical Science

    An ultrasonic wave in water is a compression wave that travels at 1,400 m/s A) An ultrasonic wave from a ship travels to the bottom of a lake and back in 0.16s. How deep is it at this point? B) If an ultrasonic wave is emitted in the ocean where the

  85. chemistry

    an electromagnetic wave has a frequency of 10 exponent 21hz. what type of electromagnetic wave has this frequency

  86. Physics

    A wave of wavelength 52 cm travels with frequency 400 Hz. What is the speed of the wave? Show work. Please help me...

  87. 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

  88. CHEMISTRY

    An electron undergoes a transition from an n=3 to an n=1 stationary state and red light is released. Which of the following forms of electromagnetic radiation could be released for an n=2 to n=1 electron transition within the same atom? -blue visible light

  89. Physics

    What is stimulated emission? a. the process of distinguishing between sources of electromagnetic waves. b. the process of reducing mechanical waves' energy. c. the process of amplifying sound waves. d. producing move light waves which are coherent with an

  90. physics

    Light is an electromagnetic wave and travels at a speed of 3.00 × 10^8 m/s. The human eye is most sensitive to yellow-green light, which has a wavelength of 5.72 × 10^-7 m. What is the frequency of this light?

  91. chemistry

    What is the wavelength, frequency, temperature, and type of the electromagnetic radiation that has: a. 90% the speed of light b. 50% the speed of light c. 10% the speed of light d. 5% the speed of light e. 1% the speed of light

  92. science

    A sound wave travels at a speed of 340 m/s. If the wave lenght of wave is 1.4 km. What is the frequency of the wave?

  93. Physics

    Which of the followings is correct for waves? a. One wave can cancel another wave so that no amplitude remains at certain points. b. While you are at rest, a car moves toward you while it is making noise. The speed of this sound wave is greater than when

  94. Physics

    sound wave of frequency 166 Hz travels with a speed 332 ms−1 along positive x-axis in air. Each point of the medium moves up and down through 5.0 mm. Write down the equation of the wave and calculate the (i) wavelength, and (ii) wave number. How far are

  95. physics

    The speed of light in a certain material is 1.6 × 108 m/s. Express the speed of light in (a) feet per nanosecond (ft/ns) and (b) millimeters per picosecond (mm/ps).

  96. Physics

    Radio waves are electromagnetic waves that travel at a speed of 3.00 108 m/s, the speed of light. An AM radio station has an assigned frequency of 1350 kHz, which means that the radio waves broadcast by the station are at this frequency. Find the

  97. PHYSICS

    A wave with a frequency of 90.0 Hz travels through steel with a wavelength of 3.46 m. What is the speed of this wave?

  98. maths

    The speed of light is about 2.99x10^8 m/s. If a rocket travels at one-fifth the speed of light, find its speed in km/h (in scientific notation correct to 2 significant figures)

  99. science

    Light waves are traveling through glass. If the wavelength of some part of the light wave is 4 x 10-7 m and the frequency of that light is 5 x 1014 Hz, what is the speed of light through the glass?

  100. Physics

    A certain type of laser emits light that has a frequency of 4.7 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.8 10-11 s. (a) How many wavelengths are there in one pulse? (b) The light enters a pool of water.

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