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Light and Sensors

Most light sensors detect light that is:
  • Emitted or given off from an object, such as the sun or a light bulb, 
  • Reflected from surfaces, and 
  • Transmitted through objects.

So what we see with our eyes and detect with machines depends on basically three factors:

  • The quality of light available, especially the intensities of light emitted by the Sun, 
  • The impact of light traveling through the atmosphere, provided we are living on Earth, 
  • The impact of light reflecting from and transmitted through objects, and The quality of the light sensor.

Scientists and engineers have spent many decades studying each of these factors.

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Looking3.mov
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Alan D. GOULD,
Jul 12, 2011, 2:51 PM