To what diameter spot should a He-Ne laser of power 10 mW be focused if the irradiance in the spot is to be the same as the sun’s irradiance at the surface of the earth? (The irradiance of the sun at the earth’s surface is about 1000 W/m2.)
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.