question_answer

An object is placed 40 cm in front of a lens as shown below.

A plane mirror is placed 30 cm behind the lens. Focal length of lens is

I. There are in all three images.

II. Two of images are erect.

III. Two of images are inverted.

IV. Two of images are of same size.

Which of the above statements are correct?

A) Statements I and IV are correct

B) Statements II and IV are correct

C) Statements I, II and IV are correct

D) Statements I, III and IV are correct

Correct Answer: D

Solution :

Ray diagram for given situation is

First image A 'B' is formed by lens. Image of A"B" is formed in plane mirror as A"B". Image of A" B" is formed by lens as A'?B".

Note That this is real and erect.