What is the proof of D=4f in physics
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PROOF d = √D-4f {D-d/D+d}* {D-d/D+d} = ratio of the two images from two positin if lens
PROOF
d = √D-4f
{D-d/D+d}* {D-d/D+d} = ratio of the two images from two positin if lens
Class-XII
PROOF
d = √D-4f
{D-d/D+d}* {D-d/D+d} = ratio of the two images from two positin if lens
Class-XII
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