Answer:what harm ful effect drawing
Radio waves are a type of electromagnetic radiation with the longest wavelengths and lowest frequencies. They are used for various purposes, including communication, broadcasting, and radar. The radio spectrum is divided into bands, each with a specific frequency range. These bands are named based on their frequency, with higher frequency bands having shorter wavelengths and vice versa. When arranged according to decreasing frequency, the bands are: Terahertz, Extremely High Frequency, Super High Frequency, Ultra High Frequency, Very High Frequency, High Frequency, Medium Frequency, Low Frequency, Very Low Frequency, Ultra Low Frequency, Super Low Frequency, and Extremely Low Frequency.