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Sources of Light Video Lecture - Class 5

FAQs on Sources of Light Video Lecture - Class 5

1. What is a source of light?

Ans. A source of light is an object or a substance that emits light energy. It could be natural sources like the sun or artificial sources like light bulbs or candles.

2. How does light travel from a source of light?

Ans. Light travels in straight lines from a source of light until it hits an object or is absorbed. This property of light is called rectilinear propagation.

3. Can light pass through all substances?

Ans. No, light cannot pass through all substances. Transparent substances like glass allow light to pass through easily, while opaque substances like wood do not allow light to pass through at all.

4. What is the difference between natural and artificial sources of light?

Ans. Natural sources of light, like the sun, produce light energy through natural processes like nuclear fusion. Artificial sources of light, like light bulbs, produce light energy through artificial means like electricity.

5. How does light help us see objects?

Ans. When light falls on an object, it reflects off the object's surface and enters our eyes. Our eyes then send signals to our brain, which processes the information and allows us to see the object.

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Oct 15, 2025 Last updated

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