An 18 mm wide diffraction grating has rulings of 710 lines per ...

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An 18 mm wide diffraction grating has rulings of 710 lines per mm. Light is incident normally on the grating. Monochromatic light of 506 nm wavelength is used. The largest angle from the normal at which an intensity maximum is formed is closest to:
 
  A) 46
  B) 44
  C) 42
  D) 40
  E) 38

Question 2

A single slit forms a diffraction pattern with monochromatic light. The fourth minimum of the pattern occurs at an angle of 32 from the central maximum. The angle at which the fifth minimum of the pattern occurs is closest to:
 
  A) 41.5
  B) 41.0
  C) 40.5
  D) 42.0
  E) 42.5

[wergv]

Answer to Question 1

A

Answer to Question 2

A

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TY

[wergv]

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