John passes red light of wavelength 685 nm through a diffraction grating of 829 lines/cm. If the screen is placed 2 m away, what is the distance in centimeters between the first and third principal bright spots?

John passes red light of wavelength 685 nm through a diffraction grating of 829 lines/cm. If the screen is placed 2 m away, what is the distance in centimeters between the first and third principal bright spots?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter19: Interference And Diffraction

Section: Chapter Questions

Problem 49A

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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.

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