A laser with an unknown wavelength is incident on a diffraction grating with a line spacing of 5015 lines/cm. The diffraction pattern on the shows a first order bright spot at a diffraction angle of 12.0°. a) What is the wavelength of the laser in nm? nm b) What line spacing (for a new grating) is required to make the second order bright spot of the same wavelength laser appear at 5.7°?

A laser with an unknown wavelength is incident on a diffraction grating with a line spacing of 5015 lines/cm. The diffraction pattern on the shows a first order bright spot at a diffraction angle of 12.0°. a) What is the wavelength of the laser in nm? nm b) What line spacing (for a new grating) is required to make the second order bright spot of the same wavelength laser appear at 5.7°?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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 laser with an unknown wavelength is incident on a diffraction grating with a line spacing of 5015 lines/cm. The diffraction pattern on the screen
shows a first order bright spot at a diffraction angle of 12.0°.
a) What is the wavelength of the laser in nm?
nm
b) What line spacing (for a new grating) is required to make the second order bright spot of the same wavelength laser appear at 5.7°?
lines/cm

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