A luminous point object is placed at O, whose image is formed at I as shown in Figure. Line AB is optical axis. Which of the following statement is`//`are correct?

Options

A. If a lens is used to obtain the image, then it must be a diverging lens and its optical centre will be the intersection point of line AB and OI.
B. If a lens is used to obtain the image, then it must be a converging lens and its optical centre will be the intersection point of line AB and OI.
C. If a mirror is used to obtain the image then the mirror must be concave and object and image subtend equal angles at the pole of the mirror.
D. I is a real image.

Answer

B, C, D

Explanation

Option `A rightarrow` Wrong because `lens// mirror` used must be of congerging neture

`B rightarrow Correct`
`C rightarrow Correct`
`D rightarrow Correct`