1.

Light with an energy flux of 25xx10^4 wm^(-2) falls on a perfectly reflecting surface at normal incidence of the surface area is 15cm^2, the average force exerted on the surface is:

Answer»

`1.25xx10^(-2)N`
`2.50xx10^(-2)N`
`1.20xx10^(-6)N`
`3.0xx10^(-2)N`

ANSWER :B


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