Fundamental Physics/Light

< Fundamental Physics(Redirected from Light)

Light comes from light sources for example Sun, Star,Moon, Electric lamp, Gasoline lamp, Fire, Candle, Fire fly

Visible lightEdit

James clerk Maxwell has shown that Visible light travels as Electromagnetic wave of a constant speed in vacuum and in air with a visible wave length 400-700 nm

  • Speed of visible light
 
  • Wave length of a visible light
 
  • Threshold frequency
According to Planck, all matter radiates visible light at Threshold frequency, fo . Hence,
 
 
  • Energy of visible light
 
With
 

Light and matterEdit

Visible light interacts with matter creates the following effects