Physics, asked by vbobbyram, 8 months ago

doctor advised to use 2.5 the lens what is the focal length of it

Answers

Answered by ashishkumar8506013

3

Answer:

Given that the power of lens P = 2D

We know that, P = 100 / f(cm)

2 = 100/f

2f = 100

f = 100/2 = 50 cm

The focal length of the lens = 50 cm

Answered by suranatarun

7

Explanation:

Power of lens = 1/focal length

so, focal length = 1/power of lens

focal length = 1/2.5

= 0.4m

so, the focal length is 40cm

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