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Light with an energy flux of 18W//cm^(2)...

Light with an energy flux of `18W//cm^(2)` falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is

A

`1.2 xx10^(-6) kgms^(-1)`

B

`2.16 xx10^(-3) kgms^(-1)`

C

`1.8 xx10^(-3) kgms^(-1)`

D

`3.2 xx10^(-3) kgms^(-1)`

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