Question 10
Fluorescent lamps are alternatives to traditional filament lamps. Fluorescent lamps work by passing an electric current through a gas. This produces ultraviolet light (that most humans cannot see). This ultraviolet light then interacts with a coating inside the bulb to generate visible light.
In a filament lamp, every 100 J of energy is transferred and released as 3 J of light and 97 J of heat. The percentage of energy released as light is 3%.
In a fluorescent lamp, every 100 J of energy is transferred and released as 97 J of light and 3 J of heat. The percentage of energy released as light is 97%.
Which lamp is more efficient — the filament lamp or the fluorescent lamp?
In a filament lamp, every 100 J of energy is transferred and released as 3 J of light and 97 J of heat. The percentage of energy released as light is 3%.
In a fluorescent lamp, every 100 J of energy is transferred and released as 97 J of light and 3 J of heat. The percentage of energy released as light is 97%.
Which lamp is more efficient — the filament lamp or the fluorescent lamp?
