Question

A beam of light parallel to the principal axis of a concave and convex lens, first passes through the concave lens of focal length \( 0.5 \, \text{m} \) and then through the convex lens of focal length \( 1.75 \, \text{m} \). If the lenses are placed \( 1.25 \, \text{m} \) apart, which of the given statement is true?

• A. The emergent beam will focus at \( 1.75 \, \text{m} \) on the principal axis.
• B. The emergent beam will focus at \( 1.25 \, \text{m} \) on the principal axis.
• C. The emergent beam will pass parallel to the principal axis.
• D. The emergent beam will focus at \( 0.75 \, \text{m} \) on the principal axis.

Hint:

If the object for a convex lens is at its focus, the emergent rays become parallel to the principal axis.

Answer 1

The Correct Option is C