Question
Light is produced in electric discharge lamps by
The correct answer is
Ionisation in a gas or vapour
Therefore, the light produced in electric discharge lamps is a direct result of the ionisation in a gas or vapour leading to excitation and subsequent emission of photons. Based on the mechanism of electric discharge lamps, the production of light fundamentally relies on ionisation in a gas or vapour .
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Important Questions from Illumination
Which of the following methods of lighting calculation can be used for rough calculations and checking purposes?
How many 200 linear lamps are required to obtain a minimum illuminance of 50 lux in a 5 m and 8 m rectangular hall?
Intensity of light is measured in:
The unit of luminous flux is:
The gas filled in vacuum filament lamps is:
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