CAn you tell me why will the temperature of the surface will be hotter at the top on the blub rathen than on the side?

thank you

Heat rises.

No it doesn't - hot fluids rise.

 

Well actually to be uber pedantic, fluids of higher density sink through fluids of lower density.

No it doesn't - hot fluids rise.

 

Well actually to be uber pedantic' date=' fluids of higher density sink through fluids of lower density.[/quote']

 

can u tell me more what is hot fluid in the bulb inside, aint it vacum isnide.

No, argon is usually used inside a bulb to stop the filament from oxidizing (I think?)

What do you mean by the "top" of the bulb?

What do you mean by the "top" of the bulb?

You the top, when u leave the bulb on for long the area where it goes black, top surface.

The tip.

 

Still, basically, heat rises (through your fluid). It's convection (sort of).

 

I think they do use argon, or sometimes other inert gases. Otherwise the heat could only be transferred through radiation, and radiation doesn't rise.