Question

an object of 60 cm height is placed at a 30 cm in front of a concave mirror of focal length 10 cm . at what distance from the mirror will the image formed what are the characteristics of the image
​

Answer 1

Answer:

Object distance   u=−36 cm

Focal length of concave mirror    f=−12 cm

Using mirror formula :      

v

1

​  

+  

u

1

​  

=  

f

1

​  

 

Or    

v

1

​  

+  

−36

1

​  

=  

−12

1

​  

 

⟹ v=−18 cm

Magnification    

h  

o

​  

 

h  

i

​  

 

​  

=  

u

−v

​  

 

Or      

10

h  

i

​  

 

​  

=  

−10

−(−18)

​  

 

⟹ h  

i

​  

=−18 cm

Image formed is real and inverted.

Explanation: