Question

is a
A) Bi-convex
B) Bi-concave
C) Plano-convex
D) Concavo-convex



pls reply correct answer​

Answer 1

Answer:

Option (b) Bi- concave is the right answer....

Answer 2

The given lens is a CONCAVO-CONVEX LENS.

But how to identify?

• Consider light ray is coming from left side to right.

• First of all, look at the left surface of the lens, the radius of curvature is directed along the direction of light, so that side is concave.

• Then, look at the right side, the radius of curvature is directed opposite to the direction of light hence, that side is concave.

• So, it's concavo-convex.

______________________

• Another easier method !

• The lens is prepared with combination of 2 individual lens as attached in image.

• Hence, it's concavo-convex.

$\star$ Hope It Helps.