Question

The image for the converging beam after refraction through the curved surface is formed at

A. `x=40 cm`
B. `x=(40)/(3)cm`
C. `x=-(40)/(3)cm`
D. `x=(180)/(7) cm`

Answer 1

Correct Answer - D
`(1)/(v)-(3)/(2xx30)=(1-(3)/(2))/(+20) (1)/(v)=-(1)/(40)+(1)/(20)=+(1)/(40) v=40 cm` .