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Define dispersive power of a grating. write an expression for dispersive power of grating.
written 7.9 years ago by gravatar for neeta.vanage neeta.vanage • 880 modified 3.9 years ago by gravatar for pedsangini276 pedsangini276 • 4.8k

Subject: Applied Physics 2

Topic: Interference And Diffraction Of Light

Difficulty: Low
engineering physics
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written 7.8 years ago by gravatar for neeta.vanage neeta.vanage • 880

The dispersive power of a grating is defined the ratio of the difference in angle of diffraction of any two neighbouring spectral lines to the diffraction in the wavelength between the two spectral lines. It is expressed as dθ/dλ

We know (a+b) sinθ = nλ

Differentiate with respect to λ …

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