Question

A three cm tall object is placed at a distance 7.5cm from a convex mirror of focal length 6cm then the image will form at

Answer 1

Answer:

Explanation:

Given,

Height of object, h  

0

​

=3cm

Object distance, u=7.5cm

Focal length, f=6cm

from mirror formula

f

1

​

=  

v

1

​

+  

u

1

​

 

6

1

​

=  

v

1

​

−  

7.5

1

​

 

v

1

​

=  

6

1

​

+  

7.5

1

​

 

v=3.33cm

magnification, m=  

h  

0

​

 

h  

i

​

 

​

=−  

u

v

​

 

⇒    

3

h  

i

​

 

​

=  

−7.5

−3.33

​

 

⇒  h  

i

​

=1.332cm

Image will be 3.33cm on the right side of the mirror and will be virtual.  

Height of the image will be 1.332cm