First slide

The lens

Question

A convex lens is used to form real image of an object on a screen. It is observed that even when the positions of the object and that screen are fixed there are two positions of the lens to form real images. If the heights of the images are 4 cm and 9 cm respectively, the height of the object is

Moderate

A

2.25 cm
B

6.00 cm
C

6.50 cm
D

36.00 cm

Solution

$O = \sqrt{I_{1} I_{2}} \Rightarrow O = \sqrt{4 \times 9} = 6 cm$

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