2006-07-31 03:32:02 · 4 answers · asked by cool victor 1 in Science & Mathematics ➔ Physics
Phosphorus coating is used in fluorescent lighting. Its purpose is to convert the ultraviolet light emitted by the gas inside into visible light (without the phosphorus, you would not get much light from a fluorescent tube).
The coating inside a regular (incandescent) lightbulb is titanium oxyde, it is there only to make the light less harsh (there are uncoated lightbuld -- clear globe -- but absence of coating makes the filament too bright to look at).
2006-07-31 03:39:03 · answer #1 · answered by Vincent G 7 · 0⤊ 0⤋
Phosphors are used in fluorescent lamps. The plasma that forms inside a fluorescent tube isn't energetic enough to glow on it's own, so the inside of the tube is coated with phosphors that glow when they are electrically stimulated. Phosphors also react to light. White LEDs for example, are actually blue LEDs with a white phosphor coating.
2006-07-31 10:41:14 · answer #2 · answered by sparkgap 2 · 0⤊ 0⤋
Yes.
2006-07-31 10:42:27 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋
yes
2006-07-31 10:45:55 · answer #4 · answered by pussycat 1 · 0⤊ 0⤋