A diffraction grating has 600 lines/mm. Light from a sodium lamp is incident normally on it. What will be the angular separation of the D1 and D2 lines of sodium (having wavelengths 5890 Å and 5896 Å ) for the first and second order? How many lines of this grating need to illuminated to resolve the D1 and D2 lines in the first order spectrum?

A diffraction grating has 600 lines/mm. Light from a sodium lamp is incident normally on it. What will be the angular separation of the D1 and D2 lines of sodium (having wavelengths 5890 Å and 5896 Å ) for the first and second order? How many lines of this grating need to illuminated to resolve the D1 and D2 lines in the first order spectrum?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Wave Optics

Section: Chapter Questions

Problem 42P

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