First slide

The lens

Question

The focal length of a combination of lenses formed with lenses having powers of + 2.50 D and – 3.75 D will be

Moderate

A

-20 cm
B

-40 cm
C

-60 cm
D

-80 cm

Solution

$P = P_{1} + P_{2} = 2 .50 - 3 .75 = - 1 .25 D So f = \frac{100}{1 .25} = - 80 cm$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App