Question

11. A 5cm 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:
(1) position
(11) nature
(111) size of the image formed.​

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

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