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

Concave mirror as well as convex lens

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Convex mirror as well as concave lens

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Two plane mirrors placed at

90^{0}

to each other

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Concave mirror as well as concave lens

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Solution

The correct option is A Concave mirror as well as convex lens
When light rays from a point source is incident on concave mirror and convex lens, emergent beams are parallel and the image is formed at infinity.

Convex mirror and concave lens on the other hand always form a virtual image. Emergent beams from these are not parallel but diverging when the object is kept at focus.

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Similar questions

Q. Question 1
Which of the following can make a parallel beam of light when light from a point source is incident on it?

(a) Concave mirror as well as convex lens
(b) Convex mirror as well as concave lens
(c) Two plane mirrors placed at 90° to each other
(d) Concave mirror as well as concave lens

Q. Which of the following can make a parallel beam of light when light from a bulb falls on it?

(a) concave mirror as well as concave lens
(b) convex mirror as well as convex lens
(c) concave mirror as well as convex lens
(d) convex mirror as well as concave lens

Which of the following can make a parallel beam (a) concave mirror as well as concave lens (b) convex mirror as well as convex lens (c) concave mirror as well as convex lens (d) convex mirror as well as concave lens

Q. A diverging lens of focal length

f_{1}

is placed in front of an coaxially with a concave mirror of focal length

f_{2}

. Their separation is

d

. A parallel beam of light incident on the lens returns as a parallel beam from the arrangement. Then, returns as a parallel beam from the arrangement. Then which of the following are correct

A parallel beam of light is incident on lens mirror combination as shown in figure, then after reflection from mirror

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