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The power of a lens of …

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The power of a lens of focal length 25cm in diopter is:-(a)0.25D (b)2.5D (c)4.0D (d)0.4D

Posted by Sunil Kumar Mishra 5 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Lucifer ? Morningstar? 5 years, 5 months ago

Its depend on lens. If lens is concave then -4, if lens is convex the +4

Sunil Kumar Mishra 5 years, 5 months ago

+4 right answer hai ya fir -4please yarr confusion clear kar do

Drift? Boi? 5 years, 5 months ago

Sorry but +4 is right ans

Yogita Ingle 5 years, 5 months ago

Here, P=?

f=−25cm

P=?

f=-25cm

As P = 100/f,

f=100/−25

=−4dioptre

Drift? Boi? 5 years, 5 months ago

0.25 Đ

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