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प्रश्न
What do you understand by refraction of light?
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उत्तर १
The change in the direction of the path of light, when it passes from one transparent medium to another transparent medium, is called refraction of light.
उत्तर २
In essence, the refraction of light is a surface phenomenon. "When a ray of light travels from one optical medium to another, it changes the direction of the path of light, and this is called the refraction of light."
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संबंधित प्रश्न
A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface?
What is lateral inversion? Explain by giving a suitable example.
A wall reflects light and a mirror also reflects light. What difference is three in the way they reflect light?
What is the difference between regular reflection of light and diffuse reflection of light?
The angle of reflection is equal to the angle of incidence:
(a) always
(b) sometimes
(c) under special conditions
(d) never
If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?
When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?
In which material do you think light rays travel faster-glass or air?
Which phenomenon of light makes the water to appear shallower than it really is?
State two factors on which the lateral displacement of the emergent ray depends.
When a ray of light travelling in glass enters into water obliquely:
(a) it is refracted towards the normal
(b) it is not refracted at all
(c) it goes along the normal
(d) it is refracted away from the normal
A vertical ray of light strikes the horizontal surface of some water:
What is the angle of refraction?
Match the Following
| Column A | Column B |
| (a) white Light | (1) Convex mirror |
| (b) Refraction | (2) Concave mirror |
| (c) Virtual images | (3) refraction |
| (d) Real images | (4) spectrum |
| (e) Prism | (5) ray of light from glass to air |
Draw a diagram showing the refraction of a light ray from water to glass. Label on it the incident ray, the angle of incidence (/), and the angle of refraction (r)
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.
The size of image of an object by a convex lens of focal length 20 cm is observed to be reduced to `1/3` rd of its size . Find the distance of the object from the optical centre of the lens .
List in proper sequence the steps of the experiment for determining the approximate focal length of a given concave mirror by obtaining the image of a distant object.
A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like, kerosene or turpentine. Support your answer with reason.
Under what circumstances there won’t be any refraction of light when it enters from one medium to another?
When a ray of light travels normal to the given surface, then the angle of refraction is ______.
