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Spherical Mirror Common Terms & Rays

In the design...

Question

In the design of telescope, concave parabolic mirror is placed hyperbolic mirror at _

A

ahead, focal point

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B

behind, focal point

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C

ahead, at a distance of

a e

from other focal point

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D

behind, at a distance of

a e

from other focal point

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Solution

The correct option is B behind, focal point
A concave parabolic reflector will reflect all incoming light rays parallel to its axis of symmetry to a single point the focus.
So, the concave parabolic mirror is placed behind the hyperbolic mirror at focal point.

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