1.

Radiation of energy E is incident on complete reflecting surface.Momentum imparted to surface will be……

Answer»

<P>`(E )/(c )`
`(2E)/(c )`
EC
`(E )/(c^(2))`

SOLUTION :Momentum of incident photon `p_(1)=(E )/(c )`
Momentum of reflected photon `p_(2)=(E )/(c )`
Momentum imparted to surface =-change in momentum,
`(-2E)/(c )`=-change in momentum of surface
`therefore` Momentum imparted to surface =`(2E)/(c )`


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