3 A perfectly reflecting mirror has an area of
1 cm². Light energy is allowed to fall on it for an
hour at the rate of 10 Wcm-2. The force that acts on
the mirror is
(a) 3.35x10-7N
(b) 6.7x10-'N
(c) 3.35x10-8N
(d) 6.7x10-N
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Answer:
correct answer is b option......
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