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प्रश्न
In the formation of spectrum of white light by a prism:
which colour is deviated most?
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उत्तर
In the formation of a spectrum of white light by a prism
violet is deviated the most
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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.
State the cause of dispersion of white light passing through a glass prism. How did Newton show that white light of sun contains seven colours using two identical glass prisms. Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the focus of the first prism.
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
(i) A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays.
(ii) Mark the least deviated colour in your diagram
(iii) Why do different coloured rays deviate differently in a prism?
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.
State the colour seen (i) at X, and (ii) at Y.
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
What conclusion do you draw about the nature of white light in part (b)?
What do you understand by the term spectrum?
Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.
A wave has wavelength 50Å of State its one use.
State two uses of ultraviolet radiation.
What is dispersion? Explain in detail.
Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
The splitting of white light into its component colours is called ____________.
Which one of the following is involved for the formation of rainbow in the sky?
During dispersion of white light by prism placed in air, for a particular value of angle of 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’.
