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What is principal focus?

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What is principal focus?

    • Posted by Akshay Satish 7 years, 5 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Jaya Shanti 7 years, 5 months ago

    principal focus, focus the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection.

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