Question

A concave lens is also called a diverging lens. true or false

Answer 1

it is false a concave lens is always a converging lens provided the lens has higher optical density in then surrounding

Answer 2

Answer:

A concave lens is also called a diverging lens. It is a true.

Explanation:

We know that,

A concave lens is a diverging lens and which is the reflecting surface inward and faces toward the center of the curvature.

Diverging means, a light ray moves away from a principle axis after refraction.

Lens's formula,

$\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}$

Here,

f = focal length of the lens

v = distance of the image

u = distance of the object

The magnification of the lens is

$m = -\dfrac{v}{u}$

Hence, A concave lens is also called a diverging lens. It is a true.