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प्रश्न
Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain with the help of suitable ray diagrams.
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उत्तर
Two convenient rays that are chosen to construct the image by a spherical mirror for a given object :
- A ray passing through the centre of curvature: A ray of light passing through the centre of curvature of a concave mirror or a ray directed in the direction of the centre of curvature of a convex mirror is reflected back along the same path after reflection.
- A ray parallel to the principal axis: A ray of light parallel the principal axis, after reflection pass through the principal focus in case of a concave mirror or appears to diverge from it in case of a convex mirror.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- optical centre
A concave mirror always forms a real image.
A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. What will be the angle of reflection?
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
State the position of object for which the image formed by a concave mirror is of same size.
The image formed by a convex mirror is of size one third the size of object. How are u and v related?
The sun is seen before the sunrise and after the sunset.
