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प्रश्न
Define the Focal length of a spherical mirror
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उत्तर
The distance between the pole and the focus is called focal length of the mirror. It is measured in meter or cm.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- aperture
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
What is a spherical mirror?
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
Discuss the position and nature of image formed by a concave mirror when an object is moved from infinity towards the pole of mirror.
Discuss the position and nature of image formed by a convex mirror when an object is moved from infinity towards the pole of mirror.
Name the kind of mirror used to obtain:
A virtual and diminished image
An object of height 2 cm is placed at a distance of 20 cm in front of a concave mirror of a focal length of 12 cm. Find the position, size, and nature of the image.
A concave mirror can be used to produce a parallel beam of light. Draw a ray to illustrate this.
Define focal length.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
In torches, search lights and headlights of vehicles the bulb is placed ______.
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
Define the radius of curvature.
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?
