The intensity of radio waves is measured using an instrument called a radiometer. This instrument detects and measures the strength of radio signals at a specific point in space.
The most commonly used unit to measure radio wave intensity is decibel-milliwatts (dBm). This unit is a logarithmic scale that represents the power ratio of the signal to a reference level.
The intensity of radio waves at a point can be affected by several factors, including the distance from the source, obstacles in the path of the signal, and atmospheric conditions such as weather and interference from other signals.
Radio wave intensity is used in a variety of applications, including communication systems, radar technology, and medical imaging. It is also used in everyday devices such as cell phones, Wi-Fi routers, and remote controls.
Radio wave intensity is generally considered to be safe for humans at the levels used in everyday devices and communication systems. However, high levels of exposure to radio waves can potentially cause health risks, and regulations are in place to ensure safe usage of these technologies.