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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
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.
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 ray of light enters a prism, it bends ______ the normal; as it leaves the prism, it bends ______ the normal.
What happens when a ray of ordinary light is passed through a triangular glass prism?
Make two diagrams to explain refraction and dispersion.
Name the process which is involved in the formation of a rainbow.
Why do you not see a spectrum of colours when light passes through a flat pane of glass?
The diagram below shows the path taken by a narrow beam of yellow monochromatic light passing through an equiangular glass prism. If the yellow light is replaced by a narrow beam of white light incident at the same angle, draw another diagram to show the passage of white light through the prism and label it to show the effect of prism on the white light.
When a white light ray falls on a prism, the ray at its first surface suffers ______.
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
A wave has wavelength 50Å of name the wave.
Differentiate between a glass slab and a glass prism.
State two uses of ultraviolet radiation.
Write the range of wavelength of the infrared spectrum.
Sunlight entering through a narrow aperture falls on a prism. Draw a neat labelled ray diagram to show the formation of the spectrum on a screen. Name the colour obtained nearer the base of the prism.
Write an Explanation.
Critical angle
What is dispersion? Explain in detail.
The splitting of white light into its component colours is called ____________.
What is a rainbow?
