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प्रश्न
What is spectrum? What is the name of glass shape used to produce a spectrum?
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उत्तर
A spectrum is a band of seven colours produced when a beam of white light is passed through a transparent glass prism. To produce a spectrum of white light, a triangular glass prism is used.
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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 ray diagram:
In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by
(A) y, p, z
(B) x, q, z
(C) p, y, z
(D) p, z, y
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
When white light passes through a prism, it ............
A ray of light moving from an optically rarer to a denser medium
State the speed of light in (a) air, (b) water, and (c) glass
What conclusion do you draw about the nature of white light in part (b)?
In the following diagram, the correctly marked angles are
(A) All
(B) Only ∠i and ∠A
(C) ∠i, ∠r and ∠A
(D) ∠i, ∠A and ∠D
In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:
(A) is parallel to the incident ray
(B) perpendicular to the incident ray
(C) is parallel to the refracted ray
(D) bends at an angle to the direction of incident ray
Draw a labeled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.
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?
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.
What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.
When white light enters a glass prism from the air, the angle of deviation is least for ____________.
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
The splitting of white light into its component colours is called ____________.
The periscope is an optical device with a polished surface that reflects the light falling on it.
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
