# Physics

A double-slit interference experiment is performed with light from a laser. The separation between the slits is 0.58 mm, and the
ﬁrst-order maximum of the interference pattern is at an angle of 0.060

from the center of
the pattern.
What is the wavelength of the laser light?

1. 👍 0
2. 👎 0
3. 👁 92
1. The coordinate of the maximum is
x(max) = k•λ•L/d,
for the first max k=1
x(max1) = λ•L/d,
tanα = x(max1)/L = λ/d.
λ = d• tanα = 0.55•10^-3•1.047•10^-3 = 5.76•10^-7 = 576 nm

1. 👍 0
2. 👎 0
posted by Elena
2. Excuse me what was the equation you used? Because the answer is wrong.

1. 👍 0
2. 👎 0
posted by Angel
3. And where did you get those numbers?

1. 👍 0
2. 👎 0
posted by Angel
4. I've taken 0.55 mm instead of 0.58 mm

If d = 0.55•10^-3, and tan α =1.047•10^-3,
λ = d• tanα = 0.58•10^-3•1.047•10^-3 = 6.07•10^-7 = 607 nm.

1. 👍 0
2. 👎 0
posted by Elena

## Similar Questions

1. ### physics

A student investigates the interference of light in a Young’s double slit experiment. i). Explain why there is no interference pattern if the two slits are 5.0 cm apart. ii). Explain why it is better for the student to observe

asked by aiman on August 15, 2015
2. ### PHySICS

A double slit experiment is performed with monochromatic light. The separation between the slits is 1.150mm apart and an interference pattern is noticed on a screen 3.90m away. If the second fringe is 4.20mm from the central

asked by Anonymous on May 26, 2013

A double-slit experiment is performed with light from a Helium Neon Laser on two slits 80 micrometers apart. The first bright interference fringe left of the center is spaced 2m from the bright center. How far away from the double

asked by kailey on March 3, 2017
4. ### physics

Laser light is commonly used to demonstrate double-slit interference. Explain why laser light is preferable to light from other sources for observing interference. Doesn't double slit interference work best on monochromatic light?

asked by anonymous on April 27, 2007
5. ### Physics

A laser emitting at 632.8nm illuminates a double slit. A screen is positioned 2.00 m from the slits. Interference fringes are observed with a separation of 1.0 cm. (a) Determine the separation of the slits. (b) Determine the angle

asked by Tom on January 16, 2011
6. ### physics

A double slit diffraction pattern is formed on a distant screen using mercury green light of wavelength 546.1 nm. Each slit has a width of 0.1 mm. The pattern shows that the 4th order interference maximum is missing. a) What is

asked by Sandhya on April 2, 2010
7. ### physics

A double-slit interference pattern is created by two narrow slits spaced 0.21 mm apart. The distance between the first and the fifth minimum on a screen 55 cm behind the slits is 6 mm. What is the wavelength of the light used in

asked by deb on February 23, 2010
8. ### physics

A double-slit interference pattern is created by two narrow slits spaced 0.21 mm apart. The distance between the first and the fifth minimum on a screen 55 cm behind the slits is 6 mm. What is the wavelength of the light used in

asked by deb on February 23, 2010
9. ### Physics - Double slit experiment

For a double-slit interference, what would happen to the distance between the bright fringes if you: a) Decreased the distance between the slide and the screen b) Increased the separation between the slits c) Decreased the

asked by Farah on November 8, 2010
10. ### Physics - Double slit experiment

For a double-slit interference, what would happen to the distance between the bright fringes if you: a) Decreased the distance between the slide and the screen b) Increased the separation between the slits c) Decreased the

asked by Farah on November 8, 2010

More Similar Questions