A glass 2 cube of edge length 5 cm placed on horizontal

Last updated: 6/25/2023

A glass 2 cube of edge length 5 cm placed on horizontal surface has a point source of light S placed at centre of face What should be minimum area to be covered on side faces so that no direct light comes out of the side faces 1 50 cm 3 100 cm S 2 39 25 cm or 4 80 cm S