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प्रश्न
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.
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उत्तर
Make a Rainbow
Materials:
- Hosepipe or garden water pipe
- A sunny day (morning or evening is ideal)
Procedure:
- Stand with your back towards the Sun.
- Hold the hosepipe or garden water pipe in front of you.
- Turn on the water and create a fine spray by partially covering the nozzle with your thumb.
Observation:
- You will see different colours of the rainbow forming in the spray of water.
Explanation:
- When sunlight passes through the water droplets in the spray, it gets refracted, reflected, and dispersed.
- This process splits the sunlight into its constituent colours, forming a spectrum that appears as a rainbow.
Conclusion:
- By using a hosepipe to create a fine spray of water with the Sun behind you, you can observe the formation of a rainbow. This demonstrates the principles of refraction, reflection, and dispersion of light.
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 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
As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?
The splitting of white light into its constituent colours is called .............
What conclusion do you draw about the nature of white light in part (b)?
A ray of white light is passed through a glass prism and a spectrum is obtained on a screen.
- Name the seven colours of the spectrum in order.
- Do the colours have the same width in the spectrum?
- Which of the colour of the spectrum of white light deviates (i) the most, (ii) the least?
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
State two uses of ultraviolet radiation.
Write the range of wavelength of the visible spectrum.
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
