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Sources of Light Video Lecture | Science Class 5

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FAQs on Sources of Light Video Lecture - Science Class 5

1. What are the different sources of light?
Ans. The different sources of light include natural sources such as the sun, stars, and fire, as well as artificial sources such as light bulbs and flashlights.
2. How does light travel from the sun to the Earth?
Ans. Light from the sun travels in the form of electromagnetic waves. These waves travel through the vacuum of space and reach the Earth, allowing us to see objects illuminated by sunlight.
3. How does a light bulb produce light?
Ans. A light bulb produces light through a process called incandescence. When an electric current passes through the filament inside the bulb, it becomes hot and emits light. The filament is usually made of tungsten.
4. Why does the color of light change when it passes through a prism?
Ans. When light passes through a prism, it gets refracted or bent. Different colors of light have different wavelengths, so they refract at different angles. This causes the light to spread out and create a spectrum of colors, resulting in the change of color.
5. How does a fire produce light?
Ans. Fire produces light through a chemical reaction called combustion. When a fuel, such as wood or gas, combines with oxygen, it undergoes a chemical reaction that releases energy in the form of heat and light. The light produced by a fire is a result of this energy release.
44 videos|204 docs|45 tests

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