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Q- A convex lens has a …

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Q- A convex lens has a focal length of 40 cm calculate its power. (with solution)

Posted by Shagun Tyagi 5 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 2 months ago

Given, focal length of convex lens (f)

= + 40 cm = + 0.4 m

Power of lens = 1/f (in meter)

= 1/ (+ 0.4) m

= + 2.5 D

So, Power of convex lens is + 2.5 D.

Simrat Kaur 5 years, 2 months ago

Focal length = 40cm = 0.4m P=1/f P=1/0.4 P=2.5D

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