White light passes through two slits 0.5 mm apart,and an interference pattern is observed on ascreen 2.5m away. The first-order fringe resemblesa rainbow with violet and red light at oppositeends. The violet light is about 2mm from thecentre of the central white fringe. The wavelengthfor the violet light is1) 200 nm2) 350 nm3) 400 nm4) 500 nm

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centre of the central white fringe. The wavelength for the violet light is

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter37: Wave Optics

Section: Chapter Questions

Problem 37.27P: The intensity on the screen at a certain point in a double- slit interference pattern is 64.0% of...

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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

White light passes through two slits 0.5 mm apart,
and an interference pattern is observed on a
screen 2.5m away. The first-order fringe resembles
a rainbow with violet and red light at opposite
ends. The violet light is about 2mm from the
centre of the central white fringe. The wavelength
for the violet light is
1) 200 nm
2) 350 nm
3) 400 nm
4) 500 nm

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