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प्रश्न
What is the relationship between the focal length and radius of curvature?
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उत्तर
The relationship between the focal length, f, and radius of curvature, r is
f = 1/2 x r.
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Centre of curvature
We can obtain an enlarged and erect image by a convex mirror.
A ray of light is incident normally on a plane mirror. What will be the:
- angle of incidence?
- angle of reflection?
What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)?
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What name is given to the distance between spherical mirror and carbon paper?
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).
Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case.
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
What is “aperture”?
