A diffraction grating produces a second-order principal maximum at 50.6° to the normal when being illuminated normally with light of wavelength 644nm. Calculate the number of lines per millimeter of the grating and the total number of principal maxima produced.
Given Parameters are:-
order, n=2
Angle,
Wavelength,
As we know,
=
So, The number of lines per mm is
Hence The number of lines per mm is
As there are second order principal maxima so,
Total of images is seen on screen from which 3 are principal maxima.
Total number of maxima produced
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