Mirror M, in Figure 36.13 is moved through a displacement AL. During this displacement, 250 fringe reversals (forma- tion of successive dark or bright bands) are counted. The light being used has a wavelength of 632.8 nm. Calculate the displacement AL.

Mirror M, in Figure 36.13 is moved through a displacement AL. During this displacement, 250 fringe reversals (forma- tion of successive dark or bright bands) are counted. The light being used has a wavelength of 632.8 nm. Calculate the displacement AL.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter3: Interference

Section: Chapter Questions

Problem 58AP: Suppose that the highest order fringe that can be observed is the eighth in a double-slit experiment...

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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

Mirror M, in Figure 36.13 is moved through a displacement
AL. During this displacement, 250 fringe reversals (forma-
tion of successive dark or bright bands) are counted. The
light being used has a wavelength of 632.8 nm. Calculate
the displacement AL.

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