[DUMBGRUNT]

The three main ways that heat moves are convection, conduction and radiation.

A complete vacuum would eliminate conduction.

Most of us here on the third planet out from the sun enjoy the solar radiation from across the vacuum that keeps us warm.

[babygene]

“The three main ways that heat moves are convection, conduction and radiation.”

And convection is part of conduction in a non-solid material.

However conduction is much more pronounced than radiation at lower temps. Also it is inversely proportional to the temp of the target.

[chopperman]

Whether a 60W bulb contains a vacuum or if it is filled with argon, the element has a resistance of 240 Ohms and it is generating 60 Watts of heat.

Now if that heat is no longer being directly traveling through the gas or vacuum to the glass to burn your hand when you touch it, then it would, in all likelihood, be traveling down the stem to the fixture and then to the glass.

I am almost 70 and I cannot recall ever being able to touch a powered 60 watt bulb and not burning my hand.

[Elsie]

Most of us here on the third planet out from the sun enjoy the solar radiation from across the vacuum that keeps us warm.

NOW you've done it!