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For two thin lenses kept in contact with each other, show that: where the terms have their usual…
For two thin lenses kept in contact with each other, show that:
$\frac{1}{F} = \frac{1}{f_1} + \frac{1}{f_2}$
where the terms have their usual meaning.
Given: Two thin lenses of focal lengths $f_1$ and $f_2$ placed coaxially in contact
To show: $\frac{1}{F} = \frac{1}{f_1} + \frac{1}{f_2}$
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From ISC 2020 Physics Paper 1, question 16.