A diffraction grating illuminated by red (630-nm) light creates the fringe pattern shown below on a screen fixed 1.8 m away from the grating. Determine the slit density of the grating in lines/mm. Do not use the small-angle approximation for this question.

A diffraction grating illuminated by red (630-nm) light creates the fringe pattern shown below on a screen fixed 1.8 m away from the grating. Determine the slit density of the grating in lines/mm. Do not use the small-angle approximation for this question.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter27: Wave Optics

Section: Chapter Questions

Problem 45PE: (a) How wide is a single slit that produces its first minimum for 633-nm light at an angle of 28.0°?...

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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 diffraction grating illuminated by red (630-nm) light
creates the fringe pattern shown below on a screen fixed
1.8 m away from the grating.
Determine the slit density of the grating in lines/mm.
Do not use the small-angle approximation for this question.
9.0 cm

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