You are setting up an interference experiment that uses a 270 nm path-length difference and a laser with an unknown wavelength. If the two waves are 190 degrees out of phase, what is the wavelength of the laser light? (in nm) (a) 190 (b) 270 (d) 512 (e) 142 (f) 460

You are setting up an interference experiment that uses a 270 nm path-length difference and a laser with an unknown wavelength. If the two waves are 190 degrees out of phase, what is the wavelength of the laser light? (in nm) (a) 190 (b) 270 (d) 512 (e) 142 (f) 460

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 72P: How many helium atoms, each with a radius of about 31 pm, must be placed end to end to have a length...

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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.

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