The Physical Stimulus for Vision
The Physical Stimulus for Vision
- Light
- A form of Electromagnetic Energy
- Two Complementary Descriptions
- Particle - Photon is unit of light.
- Wave - like a wave in ocean
Electromagnetic spectrumgamma - 10-14 - 10-12xrays - -- ~10-9Ultraviolet -- ~760 nm (>10-7)
° Visual 760-380 nmInfrared <10-6 - ~10-3radar -- 10-1radio bands > over a mile