Question

Question 7
An object 20cm from a spherical mirror give rise to a virtual image 15cm behind the mirror. The
type of the mirror and its focal length is
O concave. 8.5cm
O convex 30cm
O concave, 60cm
O convex 60cm​

Answer 1

Answer:

u=-20cm

v=15cm (virtual image)

We know that

m=−uv=−−2015=0.75

The mirror used is of convex type