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प्रश्न
What is refractive index?
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उत्तर
The ratio of the speed of light in a vacuum to the speed of light in a medium is defined as the refractive index ‘µ’ of that medium.
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संबंधित प्रश्न
Which type of reflection of light leads to the formation of images?
Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram:
(a) Incident ray
(b) Point of incidence
(c) Normal
(d) Reflected ray
(e) Angle of incidence
(f) Angle of reflection
A ray of light goes from water into air. Will it bend towards the normal or away from the normal?
A coin in a glass tumbler appears to rise as the glass tumbler is slowly filled with water. Name the phenomenon responsible for this effect.
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
The depth of a pond when seen from above appears to be less.
Image is formed by a mirror due to refraction of light.
What is atmospheric reflection? Explain with the help of a labelled diagram that the position of a star as seen by us is not its true position.
Write scientific reason.
The bottom of a pond appears raised.
A water tank appears shallower when it is viewed from the top due to refraction.
