Question

Question No.4
An object is placed at 2 m from the convex mirror and the image is at 1 m behind the mirror, then the focal length of
convex mirror is​

Answer 1

GiveN :

• Object distance is 2 m.
• Image distance is 1 m.

To Find :

Focal length

SolutioN :

Let,

• Object distance ( u )
• Image distance ( v )
• focal length ( f )

A/Q,

$\tt : \implies \dfrac{1}{f} = \dfrac{1}{v} + \dfrac{1}{u}$

$\tt : \implies \dfrac{1}{f} = \dfrac{1}{1} + \dfrac{1}{ - 2}$

$\tt : \implies \dfrac{1}{f} = \dfrac{2 - 1}{2}$

$\tt : \implies \dfrac{1}{f} = \dfrac{1}{2}$

$\tt : \implies f = 2m.$