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प्रश्न
Which type of mirror is used by a dentist?
पर्याय
Plane
Convex
Concave
Both Convex and Concave
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उत्तर
Concave
APPEARS IN
संबंधित प्रश्न
Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.
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.
Name the type of mirror used in the following situation:
Headlights of a car
Support your answer with reason.
Draw the following diagram in your answer book and show the formation of image with the help of suitable rays:
Briefly describe how you would find the focal length of a concave mirror quickly but approximately
What kind of mirror can have a focal length of, −20 cm?
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?
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?
A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, at a distance of 15 cm, from his nose. Find the position of image, and calculate the magnification.
Between which two points of concave mirror should an object be placed to obtain a magnification of:
(a) −3
(b) +25
(c) −0.4
What would your image look like if you stood close to a large:
concave mirror?
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.
If the radius of curvature of a concave mirror is 20 cm, its focal length is:
A student determines the focal length of a device 'X' by focusing the image of a distant object on a screen placed 20 cm from the device on the same side as the object. The device 'X' is
(a) Concave lens of focal length 10 cm
(b) Convex lens of focal length 20 cm
(c) Concave mirror of focal length 10 cm
(d) Concave mirror of focal length 20 cm
A _____________ mirror is used by a dentist.
List four characteristics of the image formed by a concave mirror of focal length 40 cm when the object is placed in front of it at a distance of 20 cm from its pole.
The mirror used by the ophthalmologist to examine the eye is _______.
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by ______.
Between which two points of a concave mirror should an object be placed to obtain a magnification of -2?
