Question

32 A convexe lens of focal length 20 cm is cut inte
two halves. Each of which is placed 0.5 mm and
a point object placed at a distance of 30
from the lens as shown.​

Answer 1

If the convex lens is cut then there will be changed in the focal length of the convex lens.

Explanation:

• if the focal lens is cut parallel to the principal axis of the focal length then there will be no change in the new focal length. However if there is cut perpendicular to the focal length then there will be decrease of the new focal length by half.
• Now if a point object is placed at a distance of 30 cm from the lens there will be refraction at the two surfaces of each of the cut section resulting in formation of a real image

Answer 2

Answer:

The image is at 60cm, that is the image distance is 60cm