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प्रश्न
Answer the following question:
Differentiate between a glass slab and a glass prism. What happens when a narrow beam of
(i) a monochromatic light, and
(ii) white light passes through
(a) glass slab and
(b) glass prism?
उत्तर
Glass slab: It is rectangular in shape and made up of glass. In glass slab, the direction of the incident ray and the emergent ray of light are parallel to each other.
Glass Prism: It has two triangular sides, two inclined rectangular sides, and one rectangular base. In glass prism, the direction of the incident ray and the emergent ray of light is not parallel to each other.
When a narrow beam of monochromatic light passes through:
- Glass slab: It deviates from the actual path but the direction of the incident ray and the emergent ray of light are parallel to each other.
- Glass prism: It has deviated from the actual path but the direction of the incident ray and the emergent ray of light are not parallel to each other.
When a narrow beam of white light passes through:
- Glass slab: The splitting of white light into its constituent color does not occur. And the direction of the incident ray and the emergent ray of light are parallel to each other.
- Glass prism: The splitting of white light into its constituent seven colors occurs. And the direction of the incident ray and the emergent ray of light is not parallel to each other.
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संबंधित प्रश्न
As light rays pass from air into a glass prism, are they refracted towards or away from the normal?
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Out of air and glass, which is optically rarer? Give reason.
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
A wave has wavelength 50Å of State its one use.
What is the cause of the dispersion of white light through a glass prism? Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in an inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.
Write the range of wavelength of the infrared 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 process of separation of light into its component colours while passing through a medium is called _______.
What is dispersion? Explain in detail.
