Question

write the cartesian sign conventions for spherical mirrors. apply the sign conventions to find the sign of focal length of concave and convex mirror.​

Answer 1

• Some points to note

• Since focus of concave mirror is on the left side (in front of the mirror) , Focal length of concave mirror is negative.

• Since focus of convex mirror is on the right side (behind the mirror), Focal length of convex mirror is positive.