Which one of the following is printed on a commonly used fluorescent tube light?
Which one of the following is printed on a commonly used fluorescent tube light?
(a) 220 K (b) 273 K (c) 6500 K (d) 9000 K
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(c) A fluorescent lamp or fluorescent tube is a gasdischarge lamp that uses electricity to excite mercury vapour. The excited mercury atoms produce shortwave ultraviolet light that then causes a phosphor to fluoresce, producing visible light. 6500 K is usually printed on a used fluorescent tubelight.
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