Physics-
General
Easy

Question

A photon, an electron and a uranium nucleus all have the same wavelength. The one with the most energy

  1. Is the photon    
  2. Is the electron    
  3. Is the uranium nucleus    
  4. Depends upon the wavelength and the properties of the particle.    

The correct answer is: Is the photon


    lambda equals fraction numerator h over denominator m v end fraction equals fraction numerator h over denominator square root of 2 m E end root end fraction colon therefore   E equals fraction numerator h to the power of 2 end exponent over denominator 2 m lambda to the power of 2 end exponent end fraction
    lambda is same for all, so E proportional to fraction numerator 1 over denominator m end fraction. Hence energy will be maximum for particle with lesser mass.

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