Physics, asked by saboohataibagmailcom, 4 months ago

what is the focal length of the lens if it's power is 7D

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Answered by summaiyamalik

Answer:

) Two thin lenses of power +7D & -3D are in contact. · The plano-convex lens of focal length 20cm and 30cm are placed together to form a ...

Answered by Alzafriya

Answer:

two thin lenses of power +7D and -3D are in contact with is the focal length of the combination

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