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in Physics by (70.7k points)

deBroglie wavelength of a photon is 2Å. To have this wavelength associated with a proton, it must have a kinetic energy 

(1) 2 eV 

(2) 0.2 eV 

(3) 0.02 eV 

(4) 2 Joules 

1 Answer

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Best answer

Correct option : (3) 0.02 eV

Explanation :

From deBroglie relation we have

Substituting the values of h and λ we have 

K.E = 0.02 eV

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