Question

find the Energy received by the surface during time span of 1 minute​

Answer 1

Answer:

Explanation:

10      minutes

Answer 2

The intensity of the light incident is given by:

I= At

E

Here, I=20W/cm², Area A=20cm², time

t=1min=1×60sec=60sec

∴20= E

20x60

⇒E=20×20×60

E=24×10³ J