Why do light bulbs use a thin filaments?

Answer 1

So that if a spark of light fall or flickers, it won't catch on fire.

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The light bulb's glass shell is a containment vessel It surrounds the filament and contains an inert gas. By not exposing the hot filament to surrounding oxygen, the life of the filament is extended.

Answer 2

Light Bulbs rely on high resistance to generate heat and ultimately produce light. When you increase the cross sectional surface area (thickness) of the filament, you are reducing the resistance and will produce less light. The key is to find a balance between high resistance and durability.

Answer 3

Glass was, and still is, a cost effective means of insulating the burning filiment of a light bulb from the air. It is also important that it is transparent so the light is not blocked. This greatly slows the burn rate allowing the bulb to last longer. And it protects people from burning themselves on the filiment.

Answer 4

because it helps give off as much light as possible, while thicker glass would hamper the flow of light.

Answer 5

The thin glass help avoid shattering due to different expansion rate of different part of the glass wall.

Answer 6

It is just a common sense , how can a light pass through it if it is covered with metal or cement... that serve a protection of a filament and a gas inside it.