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Light with energy flux 36 W m to the power of negative 2 end exponent is incident on a circular part of radius 1.4 m of a perfectly black body. The force experienced by the body and the momentum delivered in 10 minutes are

  1. 2.2 mu N semicolon 7.2 mu k g m s to the power of negative 1 end exponent    
  2. 3.5 mu N semicolon 7.4 mu k g m s to the power of negative 1 end exponent    
  3. 0.74 mu N semicolon 444 mu k g m s to the power of negative 1 end exponent    
  4. 7.4 mu N semicolon 2.2 mu k g m s to the power of negative 1 end exponent    

The correct answer is: 0.74 mu N semicolon 444 mu k g m s to the power of negative 1 end exponent

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