Question

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Q:4 What is light ? How many types of it?
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Answer 1

Answer:

Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometers, or 4.00 × 10⁻⁷ to 7.00 × 10⁻⁷ m, between the infrared and the ultraviolet.

There are six principal types of lighting: Natural Daylight. Incandescent Lighting. Fluorescent Lighting.