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प्रश्न
What happens when a ray of ordinary light is passed through a triangular glass prism?
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उत्तर
When a ray of ordinary light is passed through a triangular glass prism, the light splits into a spectrum of seven colours. This splitting of light into its constituent colours is called dispersion of light. The role of the prism is to separate the seven colours of the white light.
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संबंधित प्रश्न
Describe an activity to show that colours of white light splitted by a glass prism can be recombined to get white light by another identical glass prism. Also draw ray diagram to show the recombination of the spectrum of white light.
After tracing the path of a ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r) angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked angles are :
(A) ∠i and ∠r
(B) ∠i and ∠e
(C) ∠i, ∠e and ∠D
(D) ∠i, ∠r and ∠e
Draw a ray diagram to show the dispersion of white light.
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
In the figure given alongside, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum YX on the screen.
Why do different colours of white light bend through different angles with respect to the incident beam of light?
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
Why do you not see a spectrum of colours when light passes through a flat pane of glass?
Which is optically denser: water or air? Give reason
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
An object AB is placed in front of a convex lens as shown in fig. 4. Complete the ray diagram and obtain the image formed and state the nature of the image.
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
How can the presence of ultraviolet radiation be detected?
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.
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.
In the diagram, a narrow beam of white light is incident on a right-angled isosceles prism. The critical angle of the material of prism for the yellow colour of white light is 45°. Complete the diagram to show the path of blue, yellow, and red colours of white light till they emerge out of the prism.
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
When white light enters a glass prism from the air, the angle of deviation is least for ____________.
Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
Why do we see a rainbow in the sky only after rainfall?
