Question

a concave lens of focal length 20cm at what distance should a object of 5 cm tall so that it forms an iamge at 15 cm from the lens​

Answer 1

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a concave lens of focal length 20cm at what distance should a object of 5 cm tall so that it forms an iamge at 15 cm from the lens

$\huge\tt\colorbox{pink}{Answer}$

Object should be placed 60 cm to the left of the lens. Image formed is 1.25 cm high.

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Answer 2

Answer:

1 Answer. object should be placed 60 cm to the left of the lens. Image formed is 1.25 cm high

Explanation: