In the figure, assume two waves of light in air, of wavelength 670 nm, are initially in phase. One travels through a glass layer of index of refraction n₁ = 1.69 and thickness L. The other travels through an equally thick plastic layer of index of refraction n₂ = 1.44. (a) What is the smallest value L in meters should have if the waves are to end up with a phase difference of 5.29 rad? (b) If the waves arrive at some common point with the same amplitude, is their interference fully constructive, fully destructive, intermediate but closer to fully constructive, or intermediate but closer to fully destructive? ng (b) 2₁ (a) Number i Units

University Physics Volume 3
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ISBN:9781938168185
Author:William Moebs, Jeff Sanny
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Chapter3: Interference
Section: Chapter Questions
Problem 86AP: The movable mirror of a Michelson interferometer is attached to one end of a thin metal rod of...
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In the figure, assume two waves of light in air, of wavelength 670 nm, are initially in phase. One travels through a glass layer of index of
refraction n₁ = 1.69 and thickness L. The other travels through an equally thick plastic layer of index of refraction n₂ = 1.44. (a) What is
the smallest value L in meters should have if the waves are to end up with a phase difference of 5.29 rad? (b) If the waves arrive at some
common point with the same amplitude, is their interference fully constructive, fully destructive, intermediate but closer to fully
constructive, or intermediate but closer to fully destructive?
ng
(b)
n1
(a) Number i
Units
Transcribed Image Text:In the figure, assume two waves of light in air, of wavelength 670 nm, are initially in phase. One travels through a glass layer of index of refraction n₁ = 1.69 and thickness L. The other travels through an equally thick plastic layer of index of refraction n₂ = 1.44. (a) What is the smallest value L in meters should have if the waves are to end up with a phase difference of 5.29 rad? (b) If the waves arrive at some common point with the same amplitude, is their interference fully constructive, fully destructive, intermediate but closer to fully constructive, or intermediate but closer to fully destructive? ng (b) n1 (a) Number i Units
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