Problem: Two people stand 5.8 meter apart and 4.0 meter away from a large plane mirror in a dark room.
Part 1: At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam directly strikes the other person?
Part II: At what angle to the surface must a diver submerged in a lake look toward the surface to see the setting Sun just along the horizon?
Please show all work so I can fully understand all concepts. Thanks.