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How the color of a building affects indoor temperatureScience project video

Abstract

This experiment was conducted to ascertain how the color of the walls of a building affects its indoor temperature.

Hypothesis

Black and darker colored buildings will have warmer indoor temperatures compared to white and lighter colored buildings.

Scientific Terms

Electromagnetic, radiation, frequency, wavelength, terahertz

Background

Light Absorption

Light is in fact electromagnetic radiation. It is visible to the human eye in the frequency range between 400-700 terahertz. When light strikes an object it can be reflected (like in mirrors), transmitted (through a transparent object like glass) or absorbed. An object may transmit only a certain frequency of light, while absorbing all other frequencies. For example, when an object transmits only the frequency for blue light while absorbing all the other frequencies, the object will appear blue in color.

Black objects absorb all the light in the visible frequency range while white color objects will reflect all of the light in the visible frequency range. However both black and white color objects absorb infrared light.

When an object absorbs light waves, the energy carried by the light waves is converted to heat.

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Complexity level:
4
Project cost ($):
20
Time required:
2 hours to prepare, 1 hour for observation
Material availability:
Easily found
Safety concerns: