Question

Brainliest answer will be awarded

Answer 1

HEY MATE HERE IS YOUR ANSWER
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Question ||| An object is placed in front of screen and a convex lens is placed at a position such that the size of the image formed is 9 cm. When the lens is shifted through distance of 20cm, the size of the image become 1cm. The focal length of the lens and the size of the object are respectively?

Options |||A. 7.5cm and 3.5cm

B. 7.5cm and 4.5 cm

C. 6cm and 3cm

D. 7.5cm and 3cm

Answer ||| OPTION B

Answer 2

Hey mate......

ATQ .....

An object is placed in front of a screen and a convex lens in such a position such that the size of .........

The correct option is B....

I.e 7.5 and 4.5

Hope this helps❤