One complete to and fro motion of the pendulum about its mean position is called _______
The time period of a pendulum is(a) the time taken for the bob to move from one extreme position to the other.(b) the time taken by the bob for one complete to and fro motion about the mean position.(c) the time taken by the bob to go from the rest position to one extreme and return to the rest position.(d) none of the above.
Answer in one word-
One complete to and fro motion about a mean position constituting a wave.