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Light with an average flux of 20 W/cm^2 falls on a non- reflecting surface at normal incidence having surface area 20 cm^2

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in Physics by (48.3k points)
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Light with an average flux of 20 W/cm2 falls on a non- reflecting surface at normal incidence having surface area 20 cm2. The energy received by the surface during time span of 1 minute is:

(1) 48 x 103J

(2) 10 x 103J

(3) 12 x 103J

(4) 24 x 103 J

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2 Answers

+1 vote
by (48.7k points)

Correct answer is (4) 24 x 103 J

by (30 points)
No this is wrong
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by (30 points)

1.2×10^-6

U=6.48×105J

p=2.16×10-3 kgm/s

F=1.2×10-6N

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