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Standard X
Physics
Mirror Formula and Magnification
What is meant...
Question
What is meant by magnification? Write the formula for finding magnification by a spherical mirror.
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Solution
Magnification is the ratio of image height and object height. So mathematically we can write,
m
=
h
i
h
o
where
m
=
magnification,
h
i
=
height of image formed by the mirror
h
o
=
height of object.
This formula can also be written in terms of object distance and image distance.
m
=
−
v
u
, where
v
is the image distance and
u
is the object distance.
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Similar questions
Q.
If linear magnification for a spherical mirror is
3
2
, then we may write:
(symbols have their usual meanings)
Q.
Give formula for linear magnification of spherical mirror.
Q.
(a) Write down formula for the magnification obtained by a spherical mirror.
(b) Name a mirror that can give an erect and enlarged image of an object.
(c) Define the principle focus of a convex mirror.
Q.
What is meant by magnification of a lens? Write its expression.
Q.
Let the transverse magnification produced by an spherical mirror is m. Then for the same position of objective mirror the longitudinal magnification will be :
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