Which of the following exert the smallest amount of radiation pressure?
A) a 1 mW laser pointer on a 2mm diameter spot 1 m away
B) a 200 W light bulb on a 4mm diameter spot 10m away
C) a 100 W light bulb on a 2 mm diameter spot 4 m away
D) a 200 W light bulb on a 2 mm diameter spot 5 m away
E) All of the choices exert the same pressure.
Correct Answer:
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