Question

Which diagram shows image formation of an object on a screen by a converging lens?

Answer 1

Answer:

answer will be option (C).

Explanation:

reason is simple in case of first two diagrams the ray coming from infinity cuts the principal axis at 2f which is incorrect, whereas in case of last option it doesn't seem to follow geometrical optics and also image in this case seems to be formed at focus not on the screen

Answer 2

Option C) shows the correct ray diagram.

But why?

• First of all, we know that convex lenses are converging lenses.

• Now, the parallel rays of light originating from the object will undergo refraction from the convex lens and pàss through the focus.

• Hence, focal length has been marked.

• Similarly, the the light rays originating from the object will pàss through the optical centre of the lens without getting deviated.

• The above two rays will meet at the screen to produce a real image.

$\star$ Hope It Helps.