English, asked by sinchanasmc0387, 9 months ago

Two lenses have power of

(A) +2D (B) -4 D

What is the nature and focal length of each lens?

Answers

Answered by mehak7058

2

Answer:

A : focal length = 100/ power

= 100 = +50cm

2

nature is convex lens

B : focal length = 100

power

= 100 = -25cm

-4

nature is concave lens

Answered by aksharasajith7

0

Answer:

power =1/f

here power is 2d and -4d

Explanation:

p=1/f

p=(+2-4)d then p= -2d ,p=1/f

f=1/-2= -0.5m

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