One beam of coherent light travels path P1 in arriving at point Q and another coherent beam travels path P2 in arriving at the same point. If these two beams are to interfere destructively, the path difference P1 - P2 must equal: a whole number of wavelengths an odd number of half wavelengths. zero a whole number of half wavelengths

One beam of coherent light travels path P1 in arriving at point Q and another coherent beam travels path P2 in arriving at the same point. If these two beams are to interfere destructively, the path difference P1 - P2 must equal: a whole number of wavelengths an odd number of half wavelengths. zero a whole number of half wavelengths

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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

One beam of coherent light travels path P1 in arriving at point Q and
another coherent beam travels path P2 in arriving at the same
point. If these two beams are to interfere destructively, the
path difference P1 - P2 must equal:
a whole number of wavelengths
an odd number of half wavelengths.
zero
a whole number of half wavelengths

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