A convex and a concave mirror of radii 10 cm are placed facing each other and 15 cm apart. An object is placed exactly between them. If the reflection first takes place in concave and then in convex mirror the position of the final image will be

Options

A. 7 cm behind concave mirror
B. at the pole of the concave mirror
C. at the pole of the convex mirror
D. 6.7 cm in front of concave mirror

Answer

C

Explanation

(c ) For concave mirror,

Using the relation,
`1/v-1/7.5=-1/5`
`therefore` v=-15 cm
Therefore position of final image will be at the pole of the convex minor.