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प्रश्न
Write an Explanation.
Critical angle
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उत्तर
For a particular value of i (angle of incidence) for which, the value of r (angle of refraction) becomes equal to 90°, is called the critical angle.
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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.
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.
What acts as tiny prisms in the formation of a rainbow?
When white light passes through a prism, it ............
The splitting of white light into its constituent colours is called .............
The speed of light in air or vacuum is
The property of splitting of white light into its seven constituent colours is known as
Explain the cause of dispersion of white light through a prism.
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 ?
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.
A glass prism is able to produce the spectrum when white light passes through it, but a glass slab doesn’t produce any spectrum. Explain why it is so.
Draw a labelled diagram: Dispersion of light through a prism.
Distinguish between an impure spectrum and a pure spectrum.
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 splitting of white light in to seven colors is called ______.
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
When white light enters a glass prism from the air, the angle of deviation is least for ____________.
Curved mirrors have surfaces that are spherical, cylindrical, parabolic, and ellipsoid.
