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प्रश्न
Fill in the following blank with suitable word:
The focal length of a concave mirror is the distance from the ......... to the mirror.
उत्तर
) The focal length of a concave mirror is the distance from the focus to the mirror.
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संबंधित प्रश्न
Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.
Draw a ray diagram to show the path of the refracted ray in each of the following cases:-
A ray of light incident on a concave lens is
(i) passing through its optical centre.
(ii) parallel to its principal axis.
(iii) directed towards its principal focus.
An object is placed at a distance of 12 cm in front of a concave mirror of radius of curvature 30 cm. List four characteristics of the image formed by the mirror.
A communications satellite in orbit sends a parallel beam of signals down to earth. If these signals obey the same laws of reflection as light and are to be focussed onto a small receiving aerial, what should be the best shape of the metal 'dish' used to collect them?
If an object is placed at the focus of a concave mirror, where is the image formed?
An object is placed at a distance of 10 cm from a concave mirror of focal length 20 cm.
At what distance from a concave mirror of focal length 10 cm should an object be placed so that:
its real image is formed 20 cm from the mirror?
An erect and enlarged image can be formed by
You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from
The focal length of a concave mirror is 5cm. Its radius of curvature is ______.
