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प्रश्न
State the cause of dispersion of white light
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उत्तर
When a beam of white light enters a prism, it gets refracted at the point and splits into its seven constituent colors, viz. violet, indigo, blue, green, yellow, orange, and red. The acronym for the seven constituent colors of white light is VIBGYOR. This splitting of the light rays occurs because of the different angles of bending for each color and this different angles of bending occur because the different component of light faces different refractive indices when passing through the glass prism.
When a narrow beam of sunlight is allowed to fall on one of the rectangular surfaces of the glass prism, we obtain a colored spectrum with red and violet color at its extreme.
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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.
Study the following diagrams in which the path of a ray of light passing through a glass prism as traced by four students P, Q, R and S is shown:
The student who has traced the path correctly is
(A) P
(B) Q
(C) R
(D) S
What happens when a ray of ordinary light is passed through a triangular glass prism?
Make two diagrams to explain refraction and dispersion.
The property of splitting of white light into its seven constituent colours is known as
- A beam of monochromatic light undergoes minimum deviation through an equiangular prism, how does the beam pass through the prism, with respect to its base?
- If white light is used in the same way as in part (a) above, what change do you expect in the emergent beam?
- What conclusion do you draw about the nature of white light in part (b)?
If white light is used in same way what change is expected in the emergent beam?
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
In dispersion, the color of light that will bend more is ______.
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:
