Question: what are mhz and hz?
Answer: One hertz, or Hz, means that the frequency is one cycle per second. Kilohertz, or kHz, refers to how many thousands of cycles occur per second. Megahertz, or MHz, refers to millions, gigahertz, or GHz, refers to billions and terahertz, or THz refers to trillions of cycles per second. Consider a LED that blinks.