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प्रश्न
How is the focal length of a spherical mirror related to its radius
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उत्तर
The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature.
Focal length = Radius of curvature / 2
Or 2 F = R
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संबंधित प्रश्न
We can obtain a real, enlarged and inverted image by a concave mirror.
What kind of mirror is required for obtaining a virtual image of the same size as the object?
A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:
(a) 50 cm
(b) 40 cm
(c) 60 cm
(d) 30 cm
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
An object 10 cm high is placed at a distance of 20 cm in front of a spherical mirror of focal length 25 cm. By scale drawing find the nature, position, and magnification of the image in the following case:
Concave mirror
A ray of light is incident towards a plane mirror at an angle of 30° with the mirror surface. What will be the angle of reflection?
Define the radius of curvature.
