Question

4.
The image formation in a convex lens
is shown in the following figure.
А.
C с
B.
F.
B'
2F2
0
F
1
20cm
-20cm
A
AB is the object and A'B'is the image.
The focal length of the lens is :
A) 40 cm
B) 10 cm
C) 20 cm
D) 05 cm​

Answer 1

Answer:

The required diagram is shown in the figure. When an object is placed in front of the convex lens, i.e., between 2F

1

and F

1

, its image is formed beyond 2F

2

on the other side of the lens. The image is real, inverted and enlarged.

solution