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प्रश्न
State the cause of dispersion of white light
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.
In the formation of spectrum of white light by a prism:
which colour is deviated least?
What acts as tiny prisms in the formation of a rainbow?
When white light passes through a prism, it ............
The seven colours in the spectrum of sunlight in order, are represented as :
Observe the given figure and answer the following questions.
- Which colour light rays bend most?
- Which colour light rays bend least.
- What is the wavelength of violet light rays?
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
State the colour which bends:
- The most.
- The least while passing through a glass prism.
Observe the given diagram and answer the questions:
- Name the process shown in the figure.
- Name the colour that deviates the most.
- Name the colour that deviates the least.
- Name any one phenomenon in nature which is based on the above process.
- Define ‘spectrum’.
