Last Updated On 16-03-2023 - 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?
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?
For principal maxima in grating spectra
Where, 
is the order of principal maxima and 
is the angle of diffraction.
Number of maxima 
Next Question :
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By a monochromatic wave, we mean |
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a) |
A single ray |
b) |
A single ray of a single colour |
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c) |
Wave having a single wavelength |
d) |
Many rays of a single colour |
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