QJEEM21Phd9b1: JEE Main 2021 Physics - Class 12 JEEM21Phd9b1 Solution: If 2.5 × 10 − 6 N average force is exerted by a light wave on a …

If 2.5 $$\times$$ 10^$$-$$6 N average force is exerted by a light wave on a non-reflecting surface of 30 cm² area during 40 minutes of time span, the energy flux of light just before it falls on the surface is ___________ W/cm². (Round off to the Nearest Integer)

(Assume complete absorption and normal incidence conditions are there)