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- Path: sparky!uunet!caen!kuhub.cc.ukans.edu!ahamad
- From: ahamad@kuhub.cc.ukans.edu
- Newsgroups: sci.physics
- Subject: color of AC/DC ???
- Message-ID: <1992Nov9.100148.44545@kuhub.cc.ukans.edu>
- Date: 9 Nov 92 10:01:47 CST
- Organization: University of Kansas Academic Computing Services
- Lines: 19
-
- I have a question
- I have been working with circuits for quiet some time now. I have noticed
- a phenomenon of difference in color of the sparks at the switches depending on
- the type of current used.
- for the DC the sparks are brilliant white
- for the Ac the sparks are blue with touch of yellow
- please note that I did not have a capacitor in the circuit(honest)
- and this seems to hold true for comparable voltages
- I have been using this phenomenon of observing the sparks and figuring
- what type of current the circuit carries when I dont have a meter handy
- (not a good practice, I have fused many a I.C by not being carefull , but beats
- the method of working blindly)
- also note it is possible to figure if the circuit has both the components ( Ac
- and DC)
- If some kind soul could explain the basis of this phenomenon I would
- be very much obliged.
- dose the key lie in the fact that a lamp on dc gives white (?) light compared
- to lamp run on ac pale yellow ?
-
-