Mobile phones use radio waves to communicate with cell towers. Radio waves are a type of electromagnetic radiation that have relatively long wavelengths and low frequencies. They fall within the radio frequency (RF) portion of the electromagnetic spectrum.
Some other examples of electromagnetic radiation that people encounter on a regular basis include:
Wi-Fi: Wi-Fi signals also operate in the radio frequency range and are used for wireless internet connections.
Television and radio broadcasts: Broadcast signals for television and radio are transmitted as radio waves.
Bluetooth: Bluetooth technology, commonly used for wireless communication between devices like smartphones, headphones, and speakers, also utilizes radio waves.
Microwaves: Microwaves used for cooking in microwave ovens are a form of electromagnetic radiation. They have higher frequencies and shorter wavelengths compared to radio waves.
Infrared (IR) radiation: Infrared radiation is used in remote controls, thermal imaging cameras, and sensors. It is often encountered as heat radiation from objects.
Visible light: The visible light spectrum encompasses the colors we see with our eyes. Sunlight, light bulbs, and electronic displays emit visible light.
Ultraviolet (UV) radiation: UV radiation is emitted by the Sun and is responsible for tanning, sunburn, and can be harmful to the skin in excessive amounts. It is also used in UV sterilization devices and some medical treatments.
X-rays: X-rays have higher energy and shorter wavelengths than UV radiation. They are used in medical imaging, such as X-ray scans and CT scans, as well as in various industrial applications.
Gamma rays: Gamma rays have the highest energy and shortest wavelengths in the electromagnetic spectrum. They are used in cancer treatments, sterilization processes, and in scientific research.
It's worth noting that while some forms of electromagnetic radiation, such as UV radiation and X-rays, can be harmful in excessive amounts or without proper protection, most everyday exposure to these types of radiation is safe. Regulations and safety measures are in place to ensure that radiation exposure from devices like mobile phones and Wi-Fi routers remains within acceptable limits.