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प्रश्न
Why do we see a rainbow in the sky only after rainfall?
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.
संबंधित प्रश्न
The coloured light having the maximum speed in glass prism is:
(a) blue
(b) green
(c) violet
(d) yellow
Why do you not see a spectrum of colours when light passes through a flat pane of glass?
Complete the ray diagram given below to show the nature of light produced on the screen.
The phenomenon of splitting of light into its component colours is ___________ .
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 process of separation of light into its component colours while passing through a medium is called _______.
Say TRUE or FALSE
Rainbow is formed by dispersion of which light by water drops
The phenomena of light involved in the formation of rainbow are ______.
The angle of deviation through a prism is minimum when
- Incident rays and emergent rays are symmetric to the prism.
- The refracted ray inside the prism becomes parallel to its base.
- The angle of incidence is equal to that of the angle of emergence.
- When the angle of emergence has doubled the angle of incidence.
Choose the correct answer from the options given below:
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.
