Which diagram shows image formation of an object on a screen by a converging lens?
Answer -
While drawing ray diagram , we follow these rules
- A ray parallel to the principal axis will pass through the principal focus.
- A ray passing through the principal focus will become parallel to the principal axis.
- A ray passing through the optical center will emerge without deviation.
In our diagram
- In Option A : Converged ray passes through twice focal length, and not focal length. So, this is incorrect.
- In Option B : Converged ray passes through twice focal length , and not focal length. So, this is incorrect.
- In Option C : Converged ray passes through focal length, and ray passing through Optical center does not deviate. Thus, it follows all rules . So, Option C is correct .
- In Option D: Ray passing through focus (bottom ray) will become parallel to principal axis , but here ray passing through focus again converges... which is incorrect. So, this is incorrect .
So, the correct answer is (c)