Pls solve Q19. Also explain..

Dear Student

Given that a concave mirror produce two times magnified erect image of an object.

Object distance, u = -10 cm

The magnification of a concave mirror is given by :



For real image, m = -V/u = 2 ( as image is erect)
                            => -V/-10 = 2
                             =>  V /10= 2
                             => V = 20
                             

So,



v = 20 cm

The image is formed at a distance of 20 cm behind the mirror.

Regards