Question

Calculate the magnification for a convex lens of focal length 10 cm when image formed is erect and at the least distance of distinct vision.

Answer 1

Hey....friend,

Plz. have a look for your answer.........

Magnification of lens when image is formed at least distance of distinct vision,
m = ( 1 + D/f)
Here D would be 25cm
and f is given here = 10cm
So, m = ( 1 + 25/10)
m = 3.5

I hope it will help you!
Thanks!

Answer 2

The magnification of convex lens is 3.5.

Explanation:

Given that,

Focal length = 10 cm

Least distance of distinct vision = 25 cm

To calculate the magnification, use the formula as

$m=(1+\dfrac{D}{f})$

Where, D = Least distance of distinct vision

f = focal length

Put the value into the formula

$m=(1+\dfrac{25}{10})$

$m=3.5$

Hence, The magnification of convex lens is 3.5.

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Topic : magnification

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