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प्रश्न
A _____________ mirror is used by a dentist.
पर्याय
concave
convex
plane
none of the above.
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उत्तर
A concave mirror is used by a dentist.
APPEARS IN
संबंधित प्रश्न
It is desired to obtain an erect image of an object, using concave mirror of focal length of 12 cm.
Will the image be smaller or larger than the object? Draw ray diagram to show the formation of image in this case.
A 3 cm tall object is placed 18 cm in front of a concave mirror of focal length 12 cm. At what distance from the mirror should a screen be placed to see a sharp image of the object on the screen. Also calculate the height of the image formed.
Which type of mirror is used by a dentist?
A ray of light is incident on a plane mirror making an angle of 90° with the mirror surface. The angle of reflection for this ray of light will be:
(a) 45°
(b) 90°
(c) 0°
(d) 60°
ill in the following blank with suitable word:
For a convex mirror, parallel rays of light appear to diverge from a point called the ......... .
What is a spherical mirror? Distinguish between a concave mirror and a convex mirror.
Which kind of mirror is used in the headlights of a car? Why is it used for this purpose?
With the help of a labelled ray diagram, describe how a converging mirror can be used to give an enlarged upright image of an object.
An object is 100 mm in front of a concave mirror which produces an upright (erect image). The radius of curvature of the mirror is ______.
At what distance from a concave mirror focal length 10 cm should an object 2 cm long be placed in order to get an erect image 6 cm tall?
A real image of an object is to be obtained. The mirror required for this purpose is:
(a) convex
(b) concave
(c) plane
(d) either convex or concave
The image formed by a concave mirror is of the same size as the object, if the object is placed
Large ______ mirrors are used to concentrate sunlight to produce heat in solar furnaces.
According to cartesion sign convention, which mirror and which lens has negative focal length?
Name the mirror(s) that can give (i) an erect and enlarged image, (ii) same sized, inverted image
Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?
While looking at the above diagram, Nalini concluded the following.
- the image of the object will be a virtual one.
- the reflected ray will travel along the same path as the incident ray but in opposite direction.
- the image of the object will be inverted.
- this is a concave mirror and hence the focal length will be negative.
Which one of the above statements are correct?
In the headlights of motor vehicles, ______ mirrors are used as reflectors.
Which type of mirror is used in the following?
Shaving mirror
