Science

• Fluorescence 


  Light that comes from absorbed light of other electromagnetic radiation
• Bioluminescence


  The production of light emitted by living organisms
• Phosphorescence


  When an object emits light without getting hot
• Chemiluminescence


  When light is shown from a chemical reaction (no heat)
• Examples of objects emitting light

  • The Sun
  • Fire
  • Fluorescent light bulbs
  • Flashlight
  • Oil lamp
  • Lightning
• Electromagnetic spectrum from shortest to longest wavelength

  • Gamma rays
  • X-rays
  • Ultraviolet
  • Visible
  • Infrared
  • Microwaves
  • Radio waves
• Total eclipse


  • When the sun and moon are in line with each other and only the corona is shown
• Penumbra


  A region of partial shadow
• Umbra


  The darkest part of a shadow
• Reflection


  The bouncing back of light from a surface
• Refraction


  The bending of light as it passes through a window or water
• Parts of the eye


  • Pupil
  • Cornea
  • Iris
  • Lens
  • Retina
  • Optic nerve