a)dsin=m
Distance between 2lines in the grating,d=1/(8×10^5)
d=1.25×10^-6m , wavelength=500nm=5×10^-7m
Sin=m/d
Sin=2×5×10^-7/1.25×10^-6=0.8
Or angle=sin-1(0.8)=53.13
b)D=xtan
D=2×1.333=2.666m
Question 3: Light of wavelength 500 nm falls upon a diffraction grating with 800 lines/mm. a)...
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