Two lenses have powers +1 D and –2 D respectively. The power of the combination is?

–1 D

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

+2 D

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

+1 D

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

+3 D

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

Open in App

Solution

The correct option is A –1 D
Power of the lenses in contact,
$P = P_{1} + P_{2}$
= [+1 + (–2)] D = –1D
Hence, the correct answer is option (1).

Suggest Corrections

Similar questions

Two lenses having powers +2D and -4D respectively are put together. Power of the combination would be

A combination of two lenses with power 1D and 2D is there what is the total power

2, 2.5

1.7 D

Join BYJU'S Learning Program