Question

A parallel beam of light is incident normally on a plane surface absorbing 40% of the light and reflecting the rest. If the incident beam carries 60 watt of power, the force exerted by it on the surface is(a) 3.2 × 10⁻⁸ N(b) 3.2 × 10⁻⁷ N(c) 5.12 × 10⁻⁷ N(d) 5.12 × 10⁻⁸ N

Answer 1

HERE IS YOUR ANSWER :-

Option no B

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