How is the life of the filament prolonged in bulbs?
Answers
Answered by
0
Due to the presence of argon gas inside the bulb the filament is safe
Answered by
1
Tungsten atoms evaporating from the filament can be bounced back to the filament by gas atoms. The filament can be operated at a higher temperature with a fill gas than with a vacuum. ... If this is not offset by the advantage of operating the filament at a higher temperature, then the bulb is more efficient with a vacuum...
An ordinary light bulb contains an inert gas (such as argon or krypton) and nitrogen, which keep the tungsten filament from oxidizing (i.e. burning up). ... The compound then floats around inside the bulb until it hits the hot filament, whereupon the high temperature breaks it down into iodine vapour and metallic tungsten.
Similar questions