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What is the purpose of the inner phosphor coating of the fluorescent tube as shown in figure "A" of the illustration? |
A) absorb visible ultraviolet light and emit visible white light |
B) absorb visible ultraviolet light and emit invisible white light |
C) absorb invisible ultraviolet light and emit visible white light |
D) absorb invisible ultraviolet light and emit invisible white light |
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Illustration EL-0081
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