Two thin lenses of power $+ 3.5 D, - 2 D$ are placed in contact. Find the power of lens combination.

1 D

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.5 D

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

5.5 D

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0 D

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $1.5 D$
$P = P_{1} + P_{2}$

$⟹ P = 3.5 - 2$

$⟹ P = + 1.5 D$

Answer-(B).

Suggest Corrections

Similar questions

2 D

1 D

Two thin lenses of power +3.5 D and -2.5 D are placed in contact. Find the focal length of the lens combination.

+ 4 D

- 2 D

20 c m

25 c m

Join BYJU'S Learning Program