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प्रश्न
What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.
उत्तर
The spectrum is the colour band obtained on a screen when white light passes through a prism. The seven prominent colours obtained in the spectrum of white light, in order are Violet, Indigo, Blue, Green, Yellow, Orange, and Red.
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संबंधित प्रश्न
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 will happen if another similar glass prism is placed upside down behind the first prism?
Out of the following, the colour of light having the maximum wavelength is:
(a) violet
(b) indigo
(c) green
(d) orange
The diagram below shows the path taken by a narrow beam of yellow monochromatic light passing through an equiangular glass prism. If the yellow light is replaced by a narrow beam of white light incident at the same angle, draw another diagram to show the passage of white light through the prism and label it to show the effect of prism on the white light.
What conclusion do you draw about the nature of white light in part (b)?
What do you understand by the term spectrum?
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 which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
Distinguish between an impure spectrum and a pure spectrum.
Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.
