Q. An earth orbiting satellite has solar energy collecting panel with total area $5\ m^{2}$. If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is (Solar constant$= 1.4\ kWm^{- 2}$)
A) $2.33 \times 10^{- 3}\ N$
B) $2.33 \times 10^{- 4}\ N$
C) $2.33 \times 10^{- 5}\ N$
D) $2.33 \times 10^{- 6}\ N$
Explanation
(c) $Power = I \times area = (1.4 \times 10^{3}\ ) \times 5$
Force $F = \frac{Power}{c} = \frac{1.4 \times 10^{3}\ \times 5}{3 \times 10^{8}\ }$
$= 2.33 \times 10^{- 5}\ N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.