Light with an average flux of 20 W/$cm^2$ falls on a non-reflecting surface at normal incidence having surface area 20 $cm^2$. The energy received by the surface during time span of 1 minute is :

Question

Dr. Abubacker · Accepted Answer

[Solution] E = 20 × 20 × 60 = $24 	imes 10^3$ J. Answer (2).

Q. Light with an average flux of 20 W/$cm^2$ falls on a non-reflecting surface at normal incidence having surface area 20 $cm^2$. The energy received by the surface during time span of 1 minute is :

Explanation

Reviewed by Dr. Abubacker

Want to attempt the full paper?