Answer:
The period of a wave is the time it takes for one complete cycle of the wave to occur. It is given by the formula:
Period = 1 / Frequency
where frequency is the number of cycles per second.
Using this formula, we can calculate the period of the microwaves with a frequency of 30,000,000,000 Hz as:
Period = 1 / 30,000,000,000 Hz
Period = 3.33 x 10^-11 seconds
Therefore, the period of the microwaves with a frequency of 30,000,000,000 Hz is a really small number, which is approximately 3.33 x 10^-11 seconds. The answer is (d) a really small number.
Step-by-step explanation: