Question

The surface of a concave mirror is pointed towards a flashlight. Light from the flashlight hits the mirror and converges to a point. How far is this converging point from the mirrors surface if the radius of curvature (C) of the mirror is 250cm?

Answer 1

The distance from the mirror and the convergence point will be half the radius of curvature since it is the the focal point. Therefore the distance will be (250/2)cm = 125cm