Period of em wave is determined by charged particle completing one cycle of oscillation. What is the deference between period and frequency?
Period T is the time taken to complete one oscillation.
Frequency F is the number of oscillations per unit time , usually second.
F = 1/T
Suppose you are at a bus stop and the bus plying a particular route arrives every 15 minutes i.e. 1/4 hour. The time interval between buses is 15 min or 1/4 hr so that is the period . In one hour , there will be
1/(1/4) = 4 buses which is the frequency of that bus route.
