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Does Black Absorb Infrared?

Published in Physics 1 min read

Yes, black surfaces generally absorb more infrared radiation than lighter surfaces.

Why Black Surfaces Absorb More Infrared

  • Pigment and Wavelength: Black pigments absorb light across a broader spectrum of wavelengths, including infrared radiation.
  • Heat Absorption: Infrared radiation is a form of heat energy. Black surfaces absorb more heat energy from infrared radiation, causing them to warm up more quickly.

Practical Examples

  • Solar Panels: Black surfaces are often used in solar panels to efficiently absorb sunlight, which includes infrared radiation.
  • Clothing: Dark-colored clothing absorbs more heat from the sun, making you feel warmer in hot weather.

Exceptions

  • Highly Reflective Black Surfaces: Some black surfaces, like highly polished black metals, can reflect infrared radiation.

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