Question

conjugate focus are possible only in. convex mirror, concave mirror, plane mirror ,ordinary glass​

Answer 1

Answer:

Conjugate mirrors. two mirrors so placed that rays from the focus of one are received at the focus of the other, especially two concave mirrors so placed that rays proceeding from the principal focus of one and reflected in a parallel beam are received upon the other and brought to the principal focus.

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Explanation:

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Answer 2

Explanation:

. Under proper conditions light divergent from a point on or near the axis of a lens or spherical mirror is focused at another point. The point of convergence and the position of the source are interchangeable and are called conjugate foci.

Therefore they are only possible in concave mirror.

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