1.

A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is

Answer»

<P>`E/C`
`"E/C"^(2)`
`EC`
`2E/C`

Solution :Initial momentum of RADIATION, `P_(1)=(E )/(C )`
Final momentum of radiation, `P_(2)=-(E )/(C )`
`:.` Momentum transferred to the surface
`=P_(1)-P_(2)=(2E)/(C )`
Thus Correct choice is (d).


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