Question

A 5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal- length 20
cm. The distance of the object from the lens is 30 cm. Find the
(i) position
(ii) nature
(iii) size of the image formed.
Draw a ray diagram to show the formation of image in the above situation. (ray diagram is necessary to draw)

Answer 1

Answer: The size of the image is 10 cm and the image is real and inverted.

Explanation:

Given that,

Height of object h = 5 cm

Focal length f = 20 cm

The distance of the object u = -30 cm

Using lens's formula

The image is formed at 60 cm on the other side from the lens.

The magnification is

The image is real, inverted .

Size of the image,

Hence, The size of the image is 10 cm and the image is real and inverted.

Answer 2

Answer:

see the attachment.........