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प्रश्न
Large ______ mirrors are used to concentrate sunlight to produce heat in solar furnaces.
उत्तर
Large concave mirrors are used to concentrate sunlight to produce heat in solar furnaces.
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संबंधित प्रश्न
The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and reflected ray will be:
(a) 30°
(b) 60°
(c) 90°
(d) 120°
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?
Described with the help of a diagram, the nature, size and position of the image formed when an object is placed beyond the centre of curvature of a concave mirror.
An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.
Radius of curvature of a spherical mirror is ............. its focal length.
If the radius of curvature of a concave mirror is 20 cm, its focal length is:
Pick out the concave and convex mirrors from the following and tabulate them.
Rear-view mirror, Dentist’s mirror, Torchlight mirror, Mirrors in shopping malls, Make-up mirror.
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
Between which two points of a concave mirror should an object be placed to obtain a magnification of -2?
