A diffraction grating has 1.26 x 104 rulings uniformly spaced over width w = 25.4 nm. It is illuminated at normal incidence by blue light of wavelength 450 nm. At what angles to the central axis do the second- order maxima occur? O A 26.5⁰

A diffraction grating has 1.26 x 104 rulings uniformly spaced over width w = 25.4 nm. It is illuminated at normal incidence by blue light of wavelength 450 nm. At what angles to the central axis do the second- order maxima occur? O A 26.5⁰

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter3: Interference

Section: Chapter Questions

Problem 63AP: A hydrogen gas discharge lamp emits visible light at four wavelengths, =410 , 434, 486, and 656 nm....

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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 has 1.26 x 104 rulings uniformly spaced over width w = 25.4 nm. It is illuminated at
normal incidence by blue light of wavelength 450 nm. At what angles to the central axis do the second-
order maxima occur?
O A. 26.5⁰
O B. 23.3⁰
OC. 19.2⁰
O D. 20.7⁰

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