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Question

if light with wavelength 0.50 µ m falls on a slit of width 10 µ m and at an angle theta = 300 to its normal. Then angular position of first minima located on right sides of the central Fraunh offer’s diffraction will be at

  1. 33.40    
  2. 26.8    
  3. 39.80    
  4. none of these    

The correct answer is: 26.8

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