Yellow light of wavelength 590 nm passes through a diffraction grating and makes an interference pattern on

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Yellow light of wavelength 590 nm passes through a diffraction grating and makes an interference pattern on a screen 80 cm away. The first bright fringes are 1.9 cm from the center of the pattern. How many lines per mm does this grating have? 

A. 20 

B. 40 

C. 80 

D. 200

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College Physics A Strategic Approach

ISBN: 9780321595492

2nd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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