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What is principle focus of lens?

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What is principle focus of lens?

Posted by Akash Mishra 6 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Nancy Rajput 6 years, 9 months ago

When a narrow parallel beam of light is incident on a lens parallel to its principal axis the beam after refraction through the lens, converges to or appear to diverge from a fixed point, on the principal axis. This point is called the principal focus of the lens.

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