Question

One student uses a lens of focal length 50 cm another of focal length -50 cm. what is the nature of the lens and its power used by each of them?
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Answer 1

Explanation:

LET US START

F1= 50 cm = 0.5 m

F2= - 50 cm = -0.5 m

P-1=?

P2 = ?

we know that F= 1/P

IF F = 0.5 m

0.5= 1/P

P1= 2 D

it is real and inverted

IF F= -0.5 m

-0.5 = 1/P

P2 = -2 D

it is virtual and errect

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