Question

Light of wavelength 500nm is passed through a diffraction grating which has 400 lines per mm. What is the angular spectrum between the two second order maxima

Answer 1

Answer:

Explanation:

We use the grating equation dsinθ=mλ :

d=sinθmλ​=sin32.0∘3(5.00×10−7m)​=2.83×10−6m

Thus the grating gauge is

d1​=3.53×105 grooves /m=3.53×103 grooves /cm