Which of the following can make a parallel beam of light when light from a point source is incident on it ?
Which of the following can make a parallel beam of light when light from a point source is incident on it ?
The correct option is A Concave mirror as well as convex lens
Explanation for the correct option:
Option (A),
Concave mirrors and convex lenses act similarly. From a point source when the light ray hits a concave mirror or a convex lens, the beams of light that emerge are always parallel and the image is formed at infinity.
Explanation for incorrect options :
Option (B),
Convex mirror and concave lens make a divergent beam of lights when the light comes from a point source.
Option (C),
The phenomenon is not possible in plane mirrors. Only converging lenses and mirrors are good for making parallel beams of light from a point source.
Option (D),
The phenomenon is possible in concave mirrors but not in concave lenses.
Thus, the concave mirror, as well as convex lens, make parallel beams of light when the light is incident from a point source.
Concave mirror as well as convex lens
Explanation for the correct option:
Option (A),
Concave mirrors and convex lenses act similarly. From a point source when the light ray hits a concave mirror or a convex lens, the beams of light that emerge are always parallel and the image is formed at infinity.
Explanation for incorrect options :
Option (B),
Convex mirror and concave lens make a divergent beam of lights when the light comes from a point source.
Option (C),
The phenomenon is not possible in plane mirrors. Only converging lenses and mirrors are good for making parallel beams of light from a point source.
Option (D),
The phenomenon is possible in concave mirrors but not in concave lenses.
Thus, the concave mirror, as well as convex lens, make parallel beams of light when the light is incident from a point source.
