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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
8 Nov 2021

Given information

power  

wavelength  

diameter of laser beam  

diameter of pinhole  

.

Step-by-step explanation

Step 1.

using the equation of energy of photon,

 

Where, 

  is the energy of photon,

  is wavelength ,

  is Planck's constant ,    

   is speed of light  

so, from equation one have, 

 

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