What is limelight

Another everyday example of incandescence is the heating of a metal wire to about 1000 °C in a conventional light bulb. The light emitted from a candle or other form of fire is a further demonstration of incandescence. 

The light emitted by a candle originates from hot particles of soot in the flame these soot particles strongly absorb and thence re-emit it as visible light. By contrast, the gas flame of a kitchen oven is paler, despite being hotter than a candle flame, and does not emit much light owing to an absence of soot. 

Lime is the old-fashioned name for calcium oxide. As a root, it is also found in lime stone (calcium carbonate), lime pits (burial sites for the poor, which were lined with CaO) and quick lime (calcium hydroxide). 

The filament in a light bulb is made of tungsten because its melting point is so high. Operation of the bulb near its maximum temperature enables the value of A.(maX) to shift to shorter wavelengths, i.e. closer to the sensitivity of the human eye. 

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