Light is incident normally on a completely absorbing surface with an energy flux of 25 Wcm-2. If the surface has an area of 25 cm2, the momentum transferred to the surface in 40 min time duration will be:

Light is incident normally on a completely absorbing surface with an e

1.	Light is incident normally on a completely absorbing surface with an energy flux of 25 Wcm-2. If the surface has an area of 25 cm2, the momentum transferred to the surface in 40 min time duration will be:
A.	6.3 × 10-4 Ns
B.	1.4 × 10-6 Ns
C.	5.0 × 10-3 Ns
D.	3.5 × 10-6 Ns
Answer» D. 3.5 × 10-6 Ns

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Light is incident normally on a completely absorbing surface with an energy flux of 25 Wcm-2. If the surface has an area of 25 cm2, the momentum transferred to the surface in 40 min time duration will be:

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