= Two light rays (1 and 2) travelling in air (na 1) from source S (1 m above the surface of water) and meet at a point P on a screen (1 m above the surface of water), as shown below. Light ray 2 reflects from the surface of water (nw 1.33). Determine: = i. the phase difference of the light rays at point P, if wavelength of the light is 500 nm. ii. for what wavelengths we will have constructive interference at P? S Ray 1 Ray 2 Air 2m Water 1m P

= Two light rays (1 and 2) travelling in air (na 1) from source S (1 m above the surface of water) and meet at a point P on a screen (1 m above the surface of water), as shown below. Light ray 2 reflects from the surface of water (nw 1.33). Determine: = i. the phase difference of the light rays at point P, if wavelength of the light is 500 nm. ii. for what wavelengths we will have constructive interference at P? S Ray 1 Ray 2 Air 2m Water 1m P

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

=
Two light rays (1 and 2) travelling in air (na : 1) from source S (1 m above the
surface of water) and meet at a point P on a screen (1 m above the surface of
water), as shown below. Light ray 2 reflects from the surface of water (nw
1.33). Determine:
=
i. the phase difference of the light rays at point P, if wavelength of the light is
500 nm.
ii. for what wavelengths we will have constructive interference at P?
S
Ray 1
Ray 2
Air
2 m
Water
1 m

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