a concave mirror when used in reflectors as torches,reflect rays of light beams.isnt it like it must converge at a point?

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Solution

When a concave mirror is used as the reflector in torch or head light of a car the source of light ( bulb ) is placed at the focus of the mirror so that after reflection the rays emitting from bulb form a parallel beam of light which increases the range of vision of the driver. These rays not converge because the source of light is placed at the focus of concave reflector.

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Similar questions

Q. Ques. If it is seen that parallel rays are getting converged at a point near concave mirror after reflection then this point is known as?

Q. A concave mirror cannot be used as:

(a) a magnifying mirror
(b) a torch reflector
(c) a dentist's mirror
(d) a real view mirror

A concave mirror can converge parallel beams of light at one point. But rays originating from the focus after reflection does not always travel parallel to the principal axis.

We know that Concave mirror is converging in nature but If it is seen that rays after reflection from concave mirror have become parallel instead of getting converged then in this case where must have been the object placed?

Q. A point source of light

^{'} S^{'}

is placed on the principal axis of the concave mirror at a distance of

60 cm

. At what distance from the concave mirror should a flat mirror be placed, for the rays to converge at the source after two successive reflections

(

first one from the concave mirror

)

[

Radius of curvature of concave mirror is

80 cm]

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