Question

an object is kept at a distance of 80 CM in front of convex mirror of focal length is 80 cm find the distance of image from the mirror

Answer 1

Answer:

v = +40 cm

Step-by-step explanation:

refer the image attached above

Answer 2

Answer:

The distance of image from the mirror is $40cm$.

Step-by-step explanation:

Convex Mirror is a curved mirror in which the reflective surface bulges out towards the light source.

This bulging out surface reflect light outwards and hence they are not used to focus light.

A convex mirror is used in workplaces, stores, and hospitals to allow people to look around the corner and avoid colliding with one another.

Its main use is use in the vehicles as a rear view mirror.

It is given that distance of object is $-80cm$

focal length, $f=+80cm$

Focal length is always positive in case of convex mirror.

We will use mirror formula here.

$\frac{1}{f} =\frac{1}{u} +\frac{1}{v}$

Using values, we get

$\frac{1}{v} =\frac{1}{f} -\frac{1}{u}$

$\frac{1}{v} =\frac{1}{80} -\frac{1}{-80}$

$\frac{1}{v} =\frac{1}{40}$

$v=+40cm$

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