Two thin lenses of focal length F1 and F2 are separated by a distance D between them if the combination satisfies the condition for no chrom

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Two thin lenses of focal length F1 and F2 are separated by a distance D between them if the combination satisfies the condition for no chrom

Saiprasad 2nd Jul, 2019

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Vivek Joshi 10th Jul, 2019

Dear Saiprasad,

If two lenses of focal length F1 and F2 are seperated by D distance apart, then the corresponding focal length for the combination of two lenses is given by

1/F = (1/F1+1/F2)- (d/F1F2)

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