Question

is filled in incandescent bulbs.​

Answer 1

Answer:

Most modern bulbs are filled with an inert gas to reduce evaporation of the filament and prevent its oxidation. The gas is at a pressure of about 70 kPa (0.7 atm). The gas reduces evaporation of the filament, but the fill must be chosen carefully to avoid introducing significant heat losses.

Answer 2

inert gases like nitrogen