an object is size 10cm is kept at a distance of 10cm from a convex lens if the focal length of the length is 5 cm the size of the image is ?

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an object is size 10cm is kept at a distance of 10cm from a convex lens if the focal length of the length is 5 cm the size of the image is ?

naveenkalyanam309 3rd Jul, 2021

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Answer (1)

Aditya 3rd Jul, 2021

Hi aspirant,

This question can be easily solved using the lens formula and magnification formula.

Hi-10 cm

U=(-10)cm

F= 5cm

Using lens formula 1/f= 1/v - 1/u

1/v= 1/5 +(-1/10)

v= 10 cm

Now, Magnification=v/u=hi/ho

= (-10/10) = hi/10

Hi= -1cm

Therefore the image formed is real, inverted and diminished.

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Comments (4)

prasad reddy

11th Jun, 2022

your last step is wrong

Reply

nair93091

17th Jun, 2022

prasad reddy yeah its wrong

Reply

Shoba Rani

10th May, 2024

How the hell will it be diminished parley

Reply

vallabha

14th Apr, 2025

How can height of image be negative

Reply

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