Differentiate between hot source & cold source of light
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The Sun is the major source of light for the earth. The sun is a massive ball of fire, at the center of which nuclear fusion produces massive energy. This energy comes out as heat and light. is called Hot source of light
Cold light is also known as luminescence. It is light that is emitted when things are cold. Light emitted when things get hot is called incandescence – for example, the light from a Bunsen burner, a standard light bulb or an electric cooker when hot.
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