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प्रश्न
Define the following term in relation to concave mirror.
Aperture
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उत्तर
The diameter of a spherical mirror is called its aperture.
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Pole
A 50 cm tall object is at a very large distance from a diverging lens. A virtual, erect and diminished image of the object is formed at a distance of 20 cm in front of the lens. How much is the focal length of the lens?
What is a spherical mirror?
How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
Is real image always inverted?
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
Assertion: Incident ray is directed towards the centre of curvature of spherical mirror. After reflection it retraces its path.
Reason: Angle of incidence (i) = Angle of reflection (r) = 0°
