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Chapter 33: Q. 7 (page 954)

Narrow, bright fringes are observed on a screen behind a diffraction grating. The entire experiment is then immersed in water. Do the fringes on the screen get closer together, get farther apart, remain the same, or disappear? Explain.

Short Answer

Expert verified

The edges of the fringes are getting closer to each other.

Step by step solution

01

Introduction

The dazzling fringe occurs when the crest of one waveform corresponds with the crest of another. The dark fringe occurs when the trough of one wave coincides with the trough of another, resulting in dark fringes.

02

Explanation

We already know that Δy=λLd. When the experiment is submerged in water, the frequency of the light stays constant, but the wavelengths drops as the movement slows. As the wavelength of light decreases, the fringes become closer together.

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Most popular questions from this chapter

A helium-neon laser (λ=633nm) illuminates a diffraction grating. The distance between the two m=1 bright fringes is 32cm on a screen 2.0m behind the grating. What is the spacing between slits of the grating?

a. Green light will shine through a hole with a 100-mm-diameter hole of and is seen on a screen. Does the circular point of lights 20%,is on the screen shrink in diameter, rise in diameter, or remain the same in diameter by? Explain.

b. Green light will shine through a hole with a 100-μmdiameter of and is seen on a screen. Does the circular point of lights is 20%,on the screen shrink in diameter, rise in diameter, or remain the same in diameter by? Explain.

Light of wavelength550nm illuminates a double slit, and the interference pattern is observed on a screen. At the position of the m=2 bright fringe, how much farther is it to the more distant slit than to the nearer slit?

FIGURE shows the light intensity on a screen 2.5mbehind an aperture. The aperture is illuminated with light of wavelength 620nm.

a. Is the aperture a single slit or a double slit? Explain.

b. If the aperture is a single slit, what is its width? If it is a double slit, what is the spacing between the slits?

A laser beam illuminates a single, narrow slit, and the diffraction pattern is observed on a screen behind the slit. The first secondary maximum is 26mmfrom the center of the diffraction pattern. How far is the first minimum from the center of the diffraction pattern?
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