Final answer:
The vibrations per second of a 101-MHz radio wave is 101 MHz. Option (C) is correct.
Step-by-step explanation:
To determine the options for the vibrations per second of a 101-MHz radio wave, we need to convert the frequency from MHz to Hz. 1 MHz is equal to 1,000,000 Hz. So, the frequency of a 101-MHz radio wave is 101,000,000 Hz. Therefore, the correct answer is (c) 101 MHz.
Radio waves are the waves having the longest wavelength in the electromagnetic spectrum. These waves are a kind of electromagnetic radiation and have a frequency from high 300 GHz to low as 3 kHz, though somewhere it is defined above 3 GHz as microwaves.
Radio waves are a type of electromagnetic radiation. A radio wave has a much longer wavelength than visible light. Humans use radio waves extensively for communications. This radio tower has both rectangular and circular antennas to transmit and receive radio frequency energy.