The Electromagnetic Spectrum
Light, Sound and Waves

Seeing and lighting

Physics Narrative for 11-14 Supporting Physics Teaching

Starting out in thinking about seeing and light

Light travels from source to detector. Sources are luminous objects. Our eye is a detector that can see things only when light travels from the source to the detector. We can also see non-luminous objects when light reflects from their surfaces and arrives at the eye.

Not all the light emitted from the source reaches the detector:

  • some will head off in other directions
  • some will be absorbed
  • some will be scattered

But all of the light continues to travel until it is absorbed, somewhere.

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