An object `O` iis kept infront of a converging lens of focal length `30 cm` behind which there is a plane mirror at `15 cm` from the lens as shown in the figure.

Options

A. The final image is formed at 60 cm from the lens towards right of it
B. The final image is at 60 cm from lens towards left of it
C. The final image is real
D. The final image is virtual

Answer

A,B

Explanation

`(1)/(v) = (1)/(30)- (1)/(15) implies v = -30 "cm"`
`(1)/(v) - (1)/(-60) = (1)/(30) implies v = 60 cm`.
(B) Final image is at 60 cm from lens towards left of it .
(C) final image is real