The derived SI unit for frequency is hertz named after Heinrich Rudolf Hertz symbol hz. For an electromagnetic wave the coherence time is the time over which a propagating wave especially a laser or maser beam may be considered coherent meaning that its phase is on average predictable. Angular frequency 2 p period of oscillation.
Help 1-10 ms to Hz.
For an electromagnetic wave the coherence time is the time over which a propagating wave especially a laser or maser beam may be considered coherent meaning that its phase is on average predictable. As such frequency is a rate quantity which describes the rate of oscillations or vibrations or cycles or waves on a per second basis. The formula of the frequency with the SI unit is given as. Now the frequency will be Putting the value of n and p from the equation 2 and 3 in equation 4 we will get.