Why we use red torch in …
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Posted by Nitish Yadav 5 years, 7 months ago
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Meghna Thapar 5 years, 7 months ago
A laser light stays focused and does not spread out much (like a flashlight would), laser beams can travel very long distances. They can also concentrate a lot of energy on a very small area. Red light has longer wavelength so we use red torch in laser light.
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