13. Period of oscillation of 3 cm microwaves in seconds is A.1 × 1010 B.1 × 10–10 C.0.01 D.0.001
Option B Solution: The period of oscillation of 3 cm microwaves is 1 × 10-10 (Physics, Volume 1, by Halliday). The period of oscillation is the smallest interval of time in which a system undergoing oscillation returns to the state it was in at the beginning of the oscillation.
