Question

in this ques. it ask size of image why it find m magnification ​

Answer 1

Explanation:

See here, we need to find size of image which is hi /ho

By this formula we can find the height of image.

but m=h'/h = -v/u

so h'/h =-v/u

so h'= -v/u ×h

As height of image was not given but h'/h = m

and

-v/u = m

Thats why for height we found out magnification

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