Physics, asked by vivekpal44427pcxsxu, 1 year ago

Two thin lenses of focal length +20 cm and - 30 cm are put in contact . what is the focal length of the combination ?What is power of the combination ?

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Answered by sumitsainisingpdetub

6

refer to the attachment

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vivekpal44427pcxsxu: wrong answer

sumitsainisingpdetub: it's right

Answered by GurleenNimrit

3

The question isn't ckear

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