Question

18 Write two uses of convex mirror.
And
Find the focal length of a lens of power 50 D .​

Answer 1

Answer:

⭕⭕ ANSWER ⭕⭕

USES OF CONVEX MIRROR"

They are commonly used as rear and side view mirrors in cars and as security mirrors in public buildings because they allow you to see a wider view than flat or concave mirrors.

FOCAL LENGTH OF THE LENS OF POWER 50 D"

◆ Answer - Focal length = -50 cm. Type of lens = Concave.

# Given - Power of lens = - 2 D.

# Solution - Formula for power of the lens ia given by -

Power of lens = 1 / focal length. Substitute value, ...

Focal length = -50 cm. Therefore, focal length of lens is -50 cm and it is a concave lens (d/t negative power).

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