Yes, both Wi-Fi and cellphones emit electromagnetic waves as part of their operation.
Wi-Fi, short for wireless fidelity, is a technology that allows devices to connect to the internet or communicate with each other wirelessly. It operates in the radio frequency range, specifically in the 2.4 GHz or 5 GHz frequency bands. Wi-Fi devices, such as routers and access points, emit electromagnetic waves in these frequency ranges to transmit data wirelessly. These waves carry the information in the form of modulated radio signals, allowing devices like smartphones, laptops, and other Wi-Fi-enabled devices to receive and transmit data.
Cellphones, or mobile phones, also emit electromagnetic waves for communication. They operate using cellular networks, which consist of a network of base stations that communicate with mobile devices. Cellphones emit electromagnetic waves in the radio frequency range, typically ranging from a few hundred megahertz (MHz) to a few gigahertz (GHz), depending on the specific cellular technology used, such as 2G, 3G, 4G, or 5G. These waves allow cellphones to transmit and receive voice calls, text messages, and data wirelessly.
It's important to note that electromagnetic waves, including those emitted by Wi-Fi and cellphones, are a form of non-ionizing radiation. Non-ionizing radiation refers to radiation that does not have sufficient energy to remove tightly bound electrons from atoms or molecules, which is the mechanism through which ionizing radiation (such as X-rays and gamma rays) can cause damage to living tissues. The emitted electromagnetic waves from Wi-Fi and cellphones are generally considered safe within the limits set by regulatory bodies, such as the Federal Communications Commission (FCC) in the United States, when used in accordance with the recommended guidelines.