Question

a lens is of focal length 40 cm what is its power?

Answer 1

hello@

here is u r answer@

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power = 100 / f cm

= 100 /40

=2.5 D.

the power of the lens is + 2.5 D

I hope help u

Answer 2

HEY MATE!........


■ given......


Fcm=40cm.

we know power (P)=100/Fcm

▪ P=100/40

▪P=2.5D

▪ the lens power is "2.5D".



HOPE IT HELPS U DEAR.....