Question #97a47

1 Answer
xavier susil · Stefan V.
Dec 16, 2017

#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.

https://www.tutorialspoint.com/images/physics/ray_optics/refraction_lens

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 #

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