JEE Advanced 2020 Full Test 7 Paper 2

A convex lens of focal length ‌

a

2

and a plane mirror are arranged as shown. The plane mirror is inclined at an angle 45∘ with the axis and the distance between lens and mirror is equal to focal length of the lens. A point source is placed at a distance 'a' from lens at its axis. The distance between the source and the image formed after reflection from the mirror will be