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A parallel beam of monochromatic light of wavelength 5000angestrom Is iincident normally on narrow slit of wavelength 0.001mm the first minimum will formed for angle of diffraction equal to

A parallel beam of monochromatic light of wavelength 5000angestrom
 Is iincident normally on narrow slit of wavelength 0.001mm the first minimum will formed for angle of diffraction equal to 
 

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago
Dear student
 
for first minima
 
a sin theta = n * lambda 
 
sin theta = lamda/a = 0.5
 
hence theta = 30 degree
 
hope it helps
 
Regards
Arun (askIITians forum expert)
 

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