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प्रश्न
In torches, search lights and headlights of vehicles the bulb is placed ______.
पर्याय
between the pole and the focus of the reflector
very near to the focus of the reflector
between the focus and centre of curvature of the reflector
at the centre of curvature of the reflector
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उत्तर
In torches, search lights and headlights of vehicles the bulb is placed very near to the focus of the reflector.
Explanation -
In torches, search lights and headlights of vehicles concave mirrors are used. When a light source is placed at the focus of the mirror, after reflection light rays become parallel to the principal axis. Due to this, the bulb is placed very near to the focus of the reflector.
संबंधित प्रश्न
Explain the following term related to spherical lenses:- centres of curvature
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State whether the image in part (a) is real or virtual?
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- the position of the image
- the focal length of the convex mirror.
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Name the two types of spherical mirrors.
The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?
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