Find position, nature, and magnification of image formed by concave mirror

Here you will learn Class 10 Physics Chapter 1 Numericals with Solutions and can watch the video to understand the question.

An object is placed 60 cm apart from a concave mirror of a focal length of 20 cm. Find the position, nature, and magnification of the image.

Given values

Object distance (u)= -60 cm

Focal length (f)= -20 cm

[focal length of concave mirror is negative]

  (i)Position of image (v) =?

  `1/u+  1/v=1/f`

 

  `1/(-60)+  1/v=1/(-20)`

 

  `1/v=1/(-20)-  1/60`

 

  `1/v=(-3 +1 )/60`

 

  `1/v=(-2)/60`

 

  `v=60/(-2)`

 

  `v=-30 cm`

 So image will be formed at a distance of 30 cm from the concave mirror.

(ii)Magnification 

`m=-v/u` 

`m=-((-30))/(-60)` 

`m=-1/2` 

Magnification = image is half in size

 

(iii)Nature of image 

 image is inverted and real

 

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1. Numerical Quesitons