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प्रश्न
The focal length of a concave mirror is 10 cm. Find its radius of curvature.
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उत्तर
Radius of curvature = 2 × focal length
Or, R = 2f = 2 × 10 = 20 cm
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संबंधित प्रश्न
Give one use each of a concave and a convex mirror.
Define the Focal length of a spherical mirror
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
Define the terms focus and focal length of a concave mirror. Draw diagram to illustrate your answer.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
Select the correct option:
A mirror forms a virtual image (diminished) of an object, whatever be the position of object:
