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Mindmap: Light | Science Class 7

The document Mindmap: Light | Science Class 7 is a part of the Class 7 Course Science Class 7.
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FAQs on Mindmap: Light - Science Class 7

1. What is light?
Ans. Light is a form of electromagnetic radiation that is visible to the human eye. It is a type of energy that travels in waves and can be described as both a particle and a wave.
2. How does light travel?
Ans. Light travels in straight lines called rays. It can travel through a vacuum, like space, or through various materials such as air, water, or glass. When light encounters a different medium, it can be reflected, refracted, or absorbed.
3. What are the different colors of light?
Ans. Light consists of a spectrum of colors, including red, orange, yellow, green, blue, indigo, and violet. These colors are produced by the different wavelengths of light. When all the colors are combined, they appear as white light.
4. What is the speed of light?
Ans. The speed of light is approximately 299,792 kilometers per second (km/s) in a vacuum. This speed is considered to be the fastest possible speed in the universe and plays a fundamental role in many aspects of physics.
5. How is light used in everyday life?
Ans. Light has numerous applications in our daily lives. It allows us to see and perceive our surroundings, helps in communication through optical fibers, enables vision in cameras and microscopes, and is used in various technologies such as lasers, LED lights, and solar panels. Light also plays a crucial role in photography, art, and entertainment industries.
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