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Question
What acts as tiny prisms in the formation of a rainbow?
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Solution
Raindrops act as tiny prisms in the formation of a rainbow.
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RELATED QUESTIONS
State the cause of dispersion of white light passing through a glass prism. How did Newton show that white light of sun contains seven colours using two identical glass prisms. Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the focus of the first prism.
The path of a ray of light passing through a glass prism is shown below:
In this diagram, the angle of prism, angle of incidence, angle of emergence and angle of deviation, respectively, have been represented by:
(A) O, Y, Z and N,
(B) P, Y, M and Z,
(C) O, X, M and Z,
(D) P, X, Z and N.
Fill in the blank with suitable word:
When a ray of light enters a prism, it bends ................ the normal ; as it leaves the prism, it bends ................. the normal.
Draw a diagram to show the refraction of light through a glass prism. On this diagram, mark
(i) incident ray
(ii) emergent ray, and
(iii) angle of deviation.
The splitting of white light into its constituent colours is called .............
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 ?
- A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base?
- If white light is used in the same way as in part (a) above, what change do you expect in the emergent beam?
- What conclusion do you draw about the nature of white light in part (b)?
What conclusion do you draw about the nature of white light in part (b)?
When a white light ray falls on a prism, the ray at its first surface suffers ______.
The frequency range of visible light is from 3.75 × 1014 Hz to 7.5 × 1014 Hz. Calculate its wavelength range. Take speed of light = 3 × 108 m/s.
Write the range of wavelength of the infrared spectrum.
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
Write an Explanation.
Critical angle
Observe the given figure and write appropriate phenomenon of light in the box.
Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
The phenomena of light involved in the formation of rainbow are ______.
Which one of the following is involved for the formation of rainbow in the sky?
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
