An image of the sun is formed by a lens of focal length 30

Last updated: 6/27/2023

An image of the sun is formed by a lens of focal length 30 cm on the metal surface of a photo electric cell and in produces a current I The lens forming the image is then replaced by another lens of the same diameter but of foca length 15 cm The photoelectric current in this case will be In both cases the plate is kept at focal plane and norm to the axis lens 1 1 2 2 21 3 I 4 41