(A) Concave mirror as well as convex lens Try to understand simply, when a point source of light is placed at the focus of concave mirror then all light rays after reflection through mirror will become parallel to the principal axis. On the other hand, when this point source of light is placed at thRead more
(A) Concave mirror as well as convex lens
Try to understand simply, when a point source of light is placed at the focus of concave mirror then all light rays after reflection through mirror will become parallel to the principal axis. On the other hand, when this point source of light is placed at the focus of convex lens then after refraction by light rays convex lens will become parallel to the principal axis. Hence, your answer will be option [A].
[B] very near to the focus of the reflector. Simply understand that, the rays of light passing through the principal focus will go parallel to principal axis after reflection thus, forming a concentrated beam of light. Hence, due to this reason in torches, search lights, and headlights of vehicles,Read more
[B] very near to the focus of the reflector.
Simply understand that, the rays of light passing through the principal focus will go parallel to principal axis after reflection thus, forming a concentrated beam of light. Hence, due to this reason in torches, search lights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector. Your answer should be option [B].
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 Try to understand simply, when a point source of light is placed at the focus of concave mirror then all light rays after reflection through mirror will become parallel to the principal axis. On the other hand, when this point source of light is placed at thRead more
(A) Concave mirror as well as convex lens
See lessTry to understand simply, when a point source of light is placed at the focus of concave mirror then all light rays after reflection through mirror will become parallel to the principal axis. On the other hand, when this point source of light is placed at the focus of convex lens then after refraction by light rays convex lens will become parallel to the principal axis. Hence, your answer will be option [A].
In torches, search lights and headlights of vehicles the bulb is placed
[B] very near to the focus of the reflector. Simply understand that, the rays of light passing through the principal focus will go parallel to principal axis after reflection thus, forming a concentrated beam of light. Hence, due to this reason in torches, search lights, and headlights of vehicles,Read more
[B] very near to the focus of the reflector.
See lessSimply understand that, the rays of light passing through the principal focus will go parallel to principal axis after reflection thus, forming a concentrated beam of light. Hence, due to this reason in torches, search lights, and headlights of vehicles, the bulb is placed very near to the focus of the reflector. Your answer should be option [B].