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प्रश्न
(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?
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उत्तर
The splitting of white light into its component colours on passing through a glass prism is shown in the following diagram.
(ii) The least deviated colour is red, which is marked in the diagram.
(iii) Different colours have different wavelengths; therefore, they deviate differently when passing through a glass prism. The amount of deviation depends on the wavelength of the coloured light.
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संबंधित प्रश्न
In the following ray diagram the correctly marked angle are:
(a) ∠i and ∠e
(b) ∠A and ∠D
(c) ∠i, ∠e and ∠D
(d) ∠r, ∠A and ∠D
What happens when a ray of ordinary light is passed through a triangular glass 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.
Make two diagrams to explain refraction and dispersion.
The colour of white light which is deviated the maximum on passing through the glass prism is:
(a) blue
(b) indigo
(c) red
(d) orange
The coloured light having the maximum speed in glass prism is:
(a) blue
(b) green
(c) violet
(d) yellow
A ray of light moving from an optically rarer to a denser medium
How does the speed of light determine the optical density of a medium?
Explain briefly, with the help of a neat labelled diagram, how white light gets dispersed by a prism. On which surface of a prism, there is both dispersion and deviation of light, and on which surface of the prism, there is only deviation of light ?
Complete the ray diagram given below to show the nature of light produced on the screen.
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
A wave has wavelength 50Å of State its one use.
Write three conditions necessary to obtain a pure spectrum on a screen. Name the instrument in which the conditions stated by you are fulfilled.
Distinguish between an impure spectrum and a pure spectrum.
Draw a neat and labelled diagram for dispersion of light.
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.
What is a rainbow?
State the colour which bends:
- The most.
- The least while passing through a glass prism.
