Question

In the given figure, the object distance is and radius of curvature of the mirror is .

• A. $-15cm$
• B. $30cm$
• C. $-30cm$
• D. $15cm$

Answer 1

Answer: (A), (B)

$30cm$

According to Cartesian sign convention, distances to the left of the mirror are taken as negative and to the right of the mirror as positive.

Object distance $u$ is the distance between the pole and the object. So, in the given figure, $u=-15cm$.

Radius of cuvature, $R$, is the distance between pole and center of the curvature. So, in the given figure $R=30cm$.