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Tanrnayee from Std. X uses spectacles. The power of the lenses in her spectacles is-2.5 D. Answer the following questions: Find the focal length of the lenses used in her spectacles.

Answer»

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Solution :As, `P=(1)/(f(m))`
`THEREFORE" "f=(1)/(P)=(1)/(0.5)=2 m`
THUS, focal length of the lenses used in SURABHI's SPECTACLES is 2 m.


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