what is the manification of the light? derive it's equation.
Answers
Answer:
Magnification can also be related to the image distance and object distance; therefore it can also be written as: m = -v/u.
Explanation:
Description:
Whenever we observe an image of an object after reflection by spherical mirror, there can be a change in the size of object i.e. image formed can have a larger size or smaller size than the actual size of the object. This phenomenon of change in the image size is known as magnification.
Maginfication Formula
Magnification is given by −
Magnification =
Size of image
Size of Object
i.e.
m =
I
O
From figure −
m =
′′
-AB
Negative sign indicates that the image is inverted.
We know that, angle of incidence = angle of reflection
∠i = ∠r
Now, considering two similar triangles &9651;ABP and &9651;′′
′′
AB
=
′P
BP
∴ -m =
-v
-u
∴ m = -
v
u
Where,
m = magnification.
v = Image distance.
u = Object distance.