An object is 5.7 cm from a spherical concave mirror.If the image is 4.7 cm tall and 10 cm from the mirror,how tall is the object?
A)12 cm
B)11 cm
C)8.2 cm
D)2.7 cm

Question

Quizplus · Accepted Answer

The magnification (m) is the ratio of the image height (h') to the object height (h), and also the ratio of the image distance (v) to the object distance (u). So, m = h'/h = v/u. Given h' = 4.7 cm, v = 10 cm, and u = 5.7 cm, we can solve for h: h = h' * (u/v) = 4.7 * (5.7/10) = 2.7 cm.

An Object Is 5