A double-slit arrangement produces bright interferencefringes for sodium light (a distinct yellow light at a wavelength ofl = 589 nm).The fringes are angularly separated by 0.30° near thecenter of the pattern.What is the angular fringe separation if theentire arrangement is immersed in water, which has an index ofrefraction of 1.33?

A double-slit arrangement produces bright interferencefringes for sodium light (a distinct yellow light at a wavelength ofl = 589 nm).The fringes are angularly separated by 0.30° near thecenter of the pattern.What is the angular fringe separation if theentire arrangement is immersed in water, which has an index ofrefraction of 1.33?

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter3: Interference

Section: Chapter Questions

Problem 84AP: Into one arm of a Michelson interferometer, a plastic sheet of thickness 75 m is inserted, which...

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Concept explainers

Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.

Question

A double-slit arrangement produces bright interference
fringes for sodium light (a distinct yellow light at a wavelength of
l = 589 nm).The fringes are angularly separated by 0.30° near the
center of the pattern.What is the angular fringe separation if the
entire arrangement is immersed in water, which has an index of
refraction of 1.33?

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Equation for angular fringe width for bright fringe in double slit experiment in air.

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As the medium changes, wavelength of light will change. New wavelength will be,

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Equation for angular fringe width when the apparatus is in water.

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