​why is the amount of the momentum transferred by the em waves incident on the surface so small??  

Dear Student,

Momentum associated with em wave is equal to h  . h is of the order of 10–34, so momentum transferred with em waves is very small and hence momentum transferred by em waves incident on the surface is very small.


  • 1
Momentum transferred
= Energy x Speed of light
= (hv)x(c)
= 10^-22

Which is a very small value.

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