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14. What is the speed of light?​

Sagot :

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The speed of light in a vacuum is approximately 299,792,458 meters per second (about 300,000 kilometers per second or 186,282 miles per second).

Light is a form of electromagnetic radiation that is visible to the human eye. It is composed of photons, which are elementary particles that carry energy and travel in waves. Light exhibits both wave-like and particle-like properties, a concept known as wave-particle duality.

Importance of Light

  • Vision - Light enables us to see. When light hits objects, it reflects into our eyes, allowing us to perceive colors, shapes, and movements.
  • Energy Source - Sunlight is a primary energy source for the Earth. It drives photosynthésis in plants, which is essential for producing oxygen and forming the base of the food chain.
  • Technology - Light is fundamental to numerous technologies, such as photography, lasers, fiber optics, and various medical instruments.
  • Communication - Fiber optic cables use light to transmit data over long distances at high speeds, forming the backbone of modern telecommunications.
  • Scientific Research - The study of light has led to significant discoveries in physics, astronomy, and other sciences. It helps us understand the universe, from the behavior of subatomic particles to the structure of galaxies.