Frequency:
430-750 THz (terahertz)

Wavelength:
400 nm  to 700 nm
1 nm (nanometre) = 10⁻⁹ m

Uses:

• • Sight!
  • Plants use it for photosynthesis

Sources:

• • Sun
  • Stars
  • Light bulbs

Detected by:

• • Human eye
  • Photographic film
  • A CCD (charge-coupled device) or CMOS (complementary metal-oxide semiconductor) image sensors in a modern camera or phone.

 

 

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