Two thin lenses of focal length ...

Two thin lenses of focal length +20 and -10 cm are kept in contact calculate focal length of combination
  • 2 answers

Sanjay Parasharji 5 months, 1 week ago

You have to calculate power with signs

Sanjay Parasharji 5 months, 1 week ago

First calculate the power ot combination by adding these two powers and then calculate focal length.

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