Question

Question #97a47

Answer 1

`m=-h_i/h_o`.
`m=-v/u`.

Explanation:

Whenever we see the images of the object after refraction by a lens, there is a change in the size of the image can have a larger or smaller size than the object.This phenomenon is termed as magnification.


In this diagram, AB is the object. Let its height be `h_o`.

And A'B' is the image. Let its height be `h_i`.

Then, the magnification is

`m=-h_i/h_o`

The negative sign indicates that the image is inverted.

From figure :

Triangles `ABO` and `A'B'O` are similar.

Therefore ,

`(AB)/(A'B') = (B'O)/(OB )`

`h_1/h_2=-v/u`