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प्रश्न
What is the relation between focal length and radius of curvature of a concave mirror?
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उत्तर
Focal length of a spherical mirror is equal to half of the radius of curvature of spherical mirror.
Focal length = `"Radius of curvature"/2`
f = `"R"/2`
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- aperture
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
State the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain your answer with the help of suitable ray diagrams.
State the position of object for which the image formed by a concave mirror is of same size.
An object is placed at 4 cm distance in front of a concave mirror of radius of curvature 24 cm. Find the position of image. Is the image magnified?
An object forms a virtual image which is 1/8th of the size of the object. If the object is placed at a distance of 40 cm from the convex mirror, calculate:
- the position of the image
- the focal length of the convex mirror.
What do you understand by the term real image?
Is real image always inverted?
Visit a nearby hospital. You can also visit the clinic of an ENT specialist, or a dentist. Request the doctor to show you the mirrors used for examining ear, nose, throat and teeth. Can you recognise the kind of mirror used in these instruments?
