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Last Updated On 01-06-2023 - By Jeesha Sara

Red light of wavelength 625 nm is incident normally on an optical diffraction grating with  lines/m.  Including central principal maxima, how many maxima may be observed on a screen which is for from the grating?


Question ID - 150149 :-

Red light of wavelength 625 nm is incident normally on an optical diffraction grating with  lines/m.  Including central principal maxima, how many maxima may be observed on a screen which is for from the grating?

1 Answer
5876 Votes
3537

Answer Key : (17) -

For principal maxima in grating spectra

Where,  is the order of principal maxima and  is the angle of diffraction.

 Number of maxima



Next Question :

By a monochromatic wave, we mean

a)

A single ray

b)

A single ray of a single colour

c)

Wave having a single wavelength

d)

Many rays of a single colour


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