Question: 1- Define Diffraction Grating. 2- A diffraction grating has 5700 lins/mm and the angular displacement for (m = 2) is 45o.Find the wave length of

1- Define Diffraction Grating. 

 

2- A diffraction grating has 5700 lins/mm and the angular displacement for (m = 2) is 45o.Find the wave length of light source. 

 

3- Monochromatic light ( λ=600 nm) incidence normally on the grating (500 line /mm) .Find the diffraction angle for m=1,2,3.

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