What is the range of all possible frequencies of electromagnetic radiation?

• A. EM Spectrum
• B. Visible Spectrum
• C. Radio Spectrum
• D. Gamma Burst Range

Answer: (A)

All electromagnetic radiation covers a continuous range of frequencies from very low to very high. This full span is called the electromagnetic spectrum. It includes radio waves at the low-frequency end, then microwaves, infrared, visible light, ultraviolet, X-rays, and up to gamma rays at the high-frequency end. The reason this is the best answer is that it represents every possible frequency EM radiation can have, not just a subset. The visible spectrum only includes what humans can see, the radio spectrum covers just the radio frequencies used for communication, and a gamma burst range isn’t a standard category that encompasses the entire range.