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Which of the following is a type of incandescent light source?

Physics
JAMB 2023

Which of the following is a type of incandescent light source?

  • A. Fluorescent lamp
  • B. LED lamp
  • C. Tungsten filament lamp
  • D. Neon lamp
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Correct Answer: Option C
Explanation

An incandescent light source is a type of light source that produces light by heating a material until it glows. The material that is heated is usually a metal, such as tungsten. Fluorescent lamps, LED lamps, and neon lamps are all examples of non-incandescent light sources.

Fluorescent lamps produce light by passing an electric current through a gas, which causes the gas to emit ultraviolet light. The ultraviolet light then causes a coating on the inside of the lamp to fluoresce, which produces visible light.

LED lamps produce light by passing an electric current through a semiconductor material, which causes the material to emit photons. The photons then produce visible light.

Neon lamps produce light by passing an electric current through a gas, which causes the gas to emit visible light.

There is an explanation video available below.


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Explanation Video

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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789