2 explain light. Define which part of electro magnetic waves comes in light. Also explain the freauency and wave length of light and the frauency and speed of light depends.
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Light is a form of energy. The external physical cause that affects our eye to produce the sensation of vision.
Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons, each traveling in a wave-like pattern at the speed of light.The speed of light neither depends on the frequency or wavelength. The speed of light is also independent of the velocity of the source. The speed of light is 3×108ms - 1. This is the maximum known velocity of any object or wave till date.
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