give any 4 examples of light beams you might have seen around you ?
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To artificially produce a light beam, a lamp and a parabolic reflector is used in many lighting devices such as spotlights, car headlights, PAR Cans and LED housings. Light from certain types of laser has the smallest possible beam divergence.
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1) camera
2) Human eyes
3) Binoculars
4) Rainbow
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