I think it is because of the white coating. It stores energy and then releases it as light, but, I could not explain the flicker. Do you know why?
2007-11-24 05:17:49 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The collapsing magnetic field in the ballast can induce a voltage immediately after power is turned off. It can take a little time for the plasma to collapse. If you see any flickering after a second or so, my first suspicion is that some power is still being applied, or the plasma is being excited from some other source.
2007-11-24 14:31:39 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
It's the property of the gas or chemical coating used iside the tube. This is known as fluorescence.
I think the flickering may be caused by the irregular absorption of the light of the gas or of the chemical coating inside the tube and re-emitted in longer wavelength outside the tube.
2007-11-24 05:22:25 · answer #2 · answered by rene c 4 · 0⤊ 1⤋
when the power of fluo.. tube is turned off then the change in frequeny (& voltage) occurs.The ballast which trying to minimize the change release all of its extra energy stored in its magnetic field due to which the gas present in tube gain some more energy and then release it in the form of extra limunation and then it turns off.
2007-11-24 06:29:42 · answer #3 · answered by NFC IET(ADIL SALMAN 2k6-ee-254). 1 · 0⤊ 1⤋