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प्रश्न
Make two diagrams to explain refraction and dispersion.
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उत्तर
When we see a pool of water. The pool appears less deep as it is. This is due to the refraction of light.
When white light is allowed to pass through the glass prism. It splits into seven colour this is called dispersion of light.
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संबंधित प्रश्न
A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analyzing the ray diagrams, which one of the following conclusions is he likely to draw?
(A) The emergent ray is parallel to the incident ray.
(B) The emergent ray bends at an angle to the direction of the incident ray.
(C) The emergent ray and the refracted ray are at right angles to each other.
(D) The emergent ray is perpendicular to the incident ray.
In the following ray diagram the correctly marked angle are:
(a) ∠i and ∠e
(b) ∠A and ∠D
(c) ∠i, ∠e and ∠D
(d) ∠r, ∠A and ∠D
A student is observing a diagram showing the path of a ray of light passing through a glass prism. He would find that for all angles of incidence the ray of light bends:
When a beam of white light is passed through a prism, it splits to form lights of seven colours. Is it possible to recombine the lights of seven colours to obtain the white light again? Explain your answer.
What is spectrum? What is the name of glass shape used to produce a spectrum?
Which is refracted most by a prism : red light or violet light? Explain why?
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
What acts as tiny prisms in the formation of a rainbow?
A ray of light moving from an optically rarer to a denser medium
What do you understand by the term spectrum? Name the various colours present in the spectrum of sunlight.
Explain briefly, with the help of a neat labelled diagram, how white light gets dispersed by a prism. On which surface of a prism, there is both dispersion and deviation of light, and on which surface of the prism, there is only deviation of light ?
What conclusion do you draw about the nature of white light in part (b)?
In the following diagram, the correctly marked angles are
(A) All
(B) Only ∠i and ∠A
(C) ∠i, ∠r and ∠A
(D) ∠i, ∠A and ∠D
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
Distinguish between an impure spectrum and a pure spectrum.
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
Why do we see a rainbow in the sky only after rainfall?
State the colour which bends:
- The most.
- The least while passing through a glass prism.
A ray of light is incident at 45° on an equilateral prism in the diagram below.
- Name the phenomenon exhibited by the ray of light when it enters and emerges out of the prism.
- State the cause of the above phenomenon mentioned by you.
