Question

focal length is 20cm and object placed at 40cm in converging lens where the image forms and which type of image forms?

Answer 1

Answer:

Explanation:

f=20cm

and v=40cm

v

1

​

−  

u

1

​

=  

f

1

​

 

⟹  

40

1

​

−  

u

1

​

=  

20

1

​

 

⟹  

u

1

​

=  

40

−1

​

 

⟹u=−40cm

magnification m=  

u

v

​

=  

−40

40

​

=−1

Hence, the image formed is real , inverted and of same size as that of the object.