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प्रश्न
Why do we see a rainbow in the sky only after rainfall?
“We see a rainbow in the sky only after the rainfall.” Why?
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उत्तर
Raindrops present in the atmosphere after rainfall serve as a prism and refract, disperse, and internally reflect the incident sunlight, followed by final refraction. The whole sequence of dispersion and internal reflection leads to the formation of the rainbow after rainfall in the sky.
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संबंधित प्रश्न
In the following diagram, the path of a ray of light passing through a glass prism is shown:
In this diagram the angle of incidence, the angle of emergence and the angle of deviation respectively are (select the correct option):
(A) X, R and T
(B) Y, Q and T
(C) X, Q and P
(D) Y, Q and P
Why do the component colours of incident white light split into a spectrum while passing through a glass prism, explain
State the cause of dispersion of white light
What happens when a ray of ordinary light is passed through a triangular glass prism?
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?
Draw a diagram to show how white light can be dispersed into a spectrum by using a glass prism. Mark the various colours of the spectrum.
Which is refracted most by a prism : red light or violet light? Explain why?
Which of the following colour of white light is least deviated by the prism?
(a) green
(b) violet
(c) indigo
(d) yellow
Out of the following, the colour of light having the maximum wavelength is:
(a) violet
(b) indigo
(c) green
(d) orange
State the speed of light in (a) air, (b) water, and (c) glass
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.
The wavelengths of violet and red light are 4000 Å and 8000 Å respectively. Which of the two has the higher frequency?
A wave has wavelength 50Å of State its one use.
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
The periscope is an optical device with a polished surface that reflects the light falling on it.
When sunlight passes through water droplets in the atmosphere it gets dispersed into its constituent colours forming a rainbow. A similar phenomenon is observed when white light passes through a prism.
Which colour will show the maximum angle of deviation and which colour will show the minimum angle of deviation?
