Light

light

wavelenght - 400 to 700

frequency - 750 to 420 terahertz

terahertz = 1 trillion hertz

in terms of visibility light is divided into 3

-->infrared

--> visible light

-->ultraviolet

infrared- long wavelenght

         less frequency

ultraviolet- short wavelenght

             high frequency

properties of light -->intensity

                   -->propagation of direction
                   -->frrequency/wavelenght

light and photon

light is packets of energy or light is packed photons

photon

      --> charge = 0
      --> spin - 1 (clockwise or anti-clockwise)
      -->rest mass = 0
      --> 'c' or speed = 299.792,458m/s

References

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