No, heat moves through vacuum, and if there was any object in the way then it would get warm.
The Sun is an obvious example with the planets in the way that they get warm or hot. Space crafts proved that no point in the universe is at a temperature of the absolute zero.
Amazingly enough, a vacuum tube contains a vacuum, so there is little or nothing to be hot or cold.
You may be confusing it with a vacuum bottle (Thermos) where a vacuum and reflective surfaces in the hollow walls keeps the contents hot or cold
It is very hot inside because it contains an filament. It controls the movement of electrons not " molecules ". Cold outside has no affect to electronic movement.
No, Vacuum tubes are equiped with a heater to get things moving on a cold day, or a hot day or a day.
well
vacum environment prevent all heat transfer except radiation
so if there is no heat radiation, we can safely conclude that in the vacuum environment tube is cold
feel free to CMIIW
No, it can be quite warm if the filaments are on.
if it is cold, can it slow down the movement of molecules inside?
