Well, it doesn't get that hot. Typical temps are 2200C to 3000C. Any standard reference will tell you that. If temp is over 3400C, the filament melts.
A better inquiry is vaporization. Below the mp, any metal starts to vaporize. So I urge you to explore why ordinary light bulbs of 25 w or more are filled with nitrogen and xenon. Hint: consider convection currents.
why does the filament of a bulb does not melt though it heats more than 3400 degree celcius
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