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प्रश्न
Concave mirrors are used by dentists to examine teeth. Why?
उत्तर
As a dentist’s head mirror: You would have seen a circular mirror attached to a band tied to the forehead of the dentist/ENT specialist. A parallel beam of light is made to fall on the concave mirror; this mirror focuses the light beam on a small area of the body (such as teeth, throat etc.).
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संबंधित प्रश्न
What is the minimum number of rays required for locating the image formed by a concave mirror for an object? Draw a ray diagram to show the formation of a virtual image by a concave mirror.
Give two uses of concave mirrors. Explain why you would choose concave mirrors for these uses.
What kind of mirror can have a focal length of, −20 cm?
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
What is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm?
At what distance from a concave mirror of focal length 10 cm should an object be placed so that:
its virtual image is formed 20 cm from the mirror?
Draw a ray diagram to show the formation of image of an object placed on the principal axis of a convex mirror. State the position, size and nature of the image. What happens to the image as the object is moved away from the mirror?
______ is used as reflectors in torchlight.
The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?
The ENT doctor uses a ______.
