Refraction Through a Lens — Question 8

convex of focal length 1.0 m

Reason — As we know that,

$P = \dfrac{1}{f}$

Where,

P = power of lens and

f = focal length of lens.

Given,

power = + 1.0 D

Substituting the values in the formula we get,

$+1.0 \text{ D} = \Big(\dfrac{1}{f}\Big)\text{ m} \\[0.5em] \Rightarrow f = 1.0 \text{ m}$

Hence, focal length = 1.0 m