Q.

Which of the following can make a parallel beam of light when light from a point source is incident on it?

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a

Convex mirror as well as concave lens

b

Concave mirror as well as convex lens

c

Two planes placed perpendicular to each other

d

None of the above

answer is A.

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Detailed Solution

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Concave mirrors as well as the convex lens can make a parallel beam of light when light from a point source is incident on it.

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Which of the following can make a parallel beam of light when light from a point source is incident on it?