A concave shaving mirror has a radius of curvature of 20 cm. It is positioned so that the upright image of a man's face is 3 time the size of the face. How far is the mirror from the face?
Please state what equations you use.© BrainMass Inc. brainmass.com March 4, 2021, 6:51 pm ad1c9bdddf
In spherical mirrors, the focal length is simply half the radius of curvature.
In our case, the focal length of the mirror is:
f = R/2 = 10cm
The magnification is given by:
1/M = do/di
Where di is teh image distance from ...
150 words of calculation and explanation along with references on how to figure out the distance you are from a mirror based on its curvature.