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Cassegrain Telescope

In a Cassegra...

Question

In a Cassegrain telescope, which of the following mirrors is used as the secondary mirror?

A

Plane mirror

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B

Convex mirror

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C

Concave mirror

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D

None of the above

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Solution

The correct option is B Convex mirror
From the above Cassegrain telescope's diagram, we can see that the light rays first strike the concave mirror and then the convex mirror i.e, the secondary mirror.

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