Question

If object and image distance measured from the focus of a concave mirror is 25cm and 16cm then focal length of the mirror is
a) 10cm
B) 20cm
C) 25cm
D) 16cm

Steps Required.
(Don't Answer any Irrelevant thing if you don't know.
just ignore this question) ​

Answer 1

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Answer:

spherical mirrors,

spherical mirrors, v

spherical mirrors, v1

spherical mirrors, v1

spherical mirrors, v1 +

spherical mirrors, v1 + u

spherical mirrors, v1 + u1

spherical mirrors, v1 + u1

spherical mirrors, v1 + u1 =

spherical mirrors, v1 + u1 = f

spherical mirrors, v1 + u1 = f1

spherical mirrors, v1 + u1 = f1

spherical mirrors, v1 + u1 = f1

spherical mirrors, v1 + u1 = f1 Thus putting values of u and f we get v=-100cm

spherical mirrors, v1 + u1 = f1 Thus putting values of u and f we get v=-100cmNow, lateral magnification =

spherical mirrors, v1 + u1 = f1 Thus putting values of u and f we get v=-100cmNow, lateral magnification = u

spherical mirrors, v1 + u1 = f1 Thus putting values of u and f we get v=-100cmNow, lateral magnification = u−v

spherical mirrors, v1 + u1 = f1 Thus putting values of u and f we get v=-100cmNow, lateral magnification = u−v

spherical mirrors, v1 + u1 = f1 Thus putting values of u and f we get v=-100cmNow, lateral magnification = u−v =−4

Explanation:

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Answer 2

Explanation:

ANSWER

For spherical mirrors,

v

1

+

u

1

=

f

1

Thus putting values of u and f we get v=-100cm

Now, lateral magnification =

u

−v

=−4