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प्रश्न
Which type of mirror is used by a dentist?
विकल्प
Plane
Convex
Concave
Both Convex and Concave
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उत्तर
Concave
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.
State two positions in which a concave mirror produces a magnified image of a given object. List two differences between the two images.
A student wants to project the image of a candle flame on a screen 48 cm in front of a mirror by keeping the flame at a distance of 12 cm from its pole.
(a) Suggest the type of mirror he should use.
(b) Find the linear magnification of the image produced.
(c) How far is the image from its object?
(d) Draw ray diagram to show the image formation in this case.
Fill in the following blank with suitable word:
A concave mirror .......... rays of light whereas convex mirror ............ rays
Draw diagram to represent the action of a concave mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the concave mirror.
For what position of an object, a real and diminished image is formed by a concave mirror?
Explain why, a ray of light passing through the centre of curvature of a concave mirror gets reflected back along the same path.
Make labelled ray diagrams to illustrate the formation of:
a real image by a converging mirror.
Which type of mirror is used in a solar furnace? Support your answer with reason.
The real image formed by a concave mirror is smaller than the object if the object is:
(a) between centre of curvature and focus
(b) at a distance greater than radius of curvature
(c) at a distance equal to radius of curvature
(d) at a distance equal to focal length
The angle of incidence for of light passing through the centre of curvature of a concave mirror is:
(a) 45°
(b) 90°
(c) 0°
(d) 180°
An object of 5.0 cm size is placed at a distance of 20.0 cm from a converging mirror of focal length 15.0 cm. At what distance from the mirror should a screen be placed to get the sharp image? Also calculate the size of the image.
Between which two points of concave mirror should an object be placed to obtain a magnification of:
(a) −3
(b) +25
(c) −0.4
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
An object is placed 15 cm from (a) a converging mirror, and (b) a diverging mirror, of radius of curvature 20 cm. Calculate the image position and magnification in each case.
Why are concave mirrors used in solar devices?
The mirror used by the ophthalmologist to examine the eye is _______.
For a real object, which of the following can produce a real image?
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?
Which type of mirror is used in the following?
Head lamps of a car
