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प्रश्न
State two uses of a concave mirror.
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उत्तर
Two uses of concave mirror are :
- Concave mirror is used as REFLECTOR in headlights of cars and in searchlight. The source of light (bulb) is placed at the principal focus and the reflector forms a parallel beam of light.
- For doctors to examine throat, ear, nose and eyes, light is focused with the help of a concave mirror.
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संबंधित प्रश्न
If an object is at infinity (very large distance) in front of a concave mirror, where is the image formed?
Giving reasons, state the 'signs' (positive or negative) which can be given to the following:
(a) object distance (u) for a concave mirror or convex mirror
(b) image distance (v) for a concave mirror
(c) image distance (v) for a convex mirror
An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
Calculate the image distance.
A large concave mirror has a radius of curvature of 1.5 m. A person stands 10 m in front of the mirror. Where is the person's image?
At what distance from a concave mirror of focal length 10 cm should an object be placed so that:
its real image is formed 20 cm from the mirror?
Draw a ray diagram to show the formation of image of an object placed between the focus and centre of curvature of a concave mirror. State the position, size and nature of the image.
You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from
An image formed by a lens is erect. Such an image could be formed by a
The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?
