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प्रश्न
- 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.
- Mark the least deviated colour in your diagram.
- 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.
- The least deviated colour is red, which is marked in the diagram.
- 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.
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
In the formation of spectrum of white light by a prism:
which colour is deviated most?
What acts as tiny prisms in the formation of a rainbow?
The property of splitting of white light into its seven constituent colours is known as
What conclusion do you draw about the nature of white light in part (b)?
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
What do you understand by spectrum? Name the seven prominent colours in order, as obtained in the spectrum of white light.
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
Write an Explanation.
Critical angle
Observe the given figure and write appropriate phenomenon of light in the box.
Say TRUE or FALSE
After passing through a prism, white light splits into a band of seven colours
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?
Why do we see a rainbow in the sky only after rainfall?
State True or False:
"Wavelength of red light is close to 700 nm.”
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’.
When sunlight passes through water droplets in the atmosphere it gets dispersed into its constituent colours forming a rainbow. A similar phenomenon is observed when white light passes through a prism.
Instead of sunlight, a green-coloured ray is passed through a glass prism. What will be the colour of the emergent ray?
Make a rainbow
Try to make your own rainbow. You can try this project in the morning or in the evening. Stand with your back towards the Sun. Take a hosepipe or a water pipe used in the garden. Make a fine spray in front of you. You can see different colours of rainbow in the spray.
