Magnets do not block electromagnetic radiation (EMR) from cell phones or other devices. While magnets can interact with electromagnetic fields, they do not act as a shield or barrier for blocking or absorbing EMR.
Electromagnetic radiation consists of oscillating electric and magnetic fields that propagate through space. Magnets, on the other hand, produce their own magnetic fields. These magnetic fields can interact with certain materials or components, but they do not have the ability to selectively block or absorb specific frequencies of EMR.
The effectiveness of a material or object in blocking or attenuating EMR depends on its composition and properties. For instance, materials such as metals or conductive materials can reflect or absorb electromagnetic waves to some extent, depending on the frequency range and the characteristics of the material.
To block or reduce EMR from devices like cell phones, specific shielding materials are used. These materials are designed to absorb or reflect the electromagnetic waves, reducing their intensity. Common examples of EMR shielding materials include conductive metals, metal mesh, or special coatings that contain conductive materials.
It's important to note that simply placing a magnet near a device like a cell phone will not block or significantly reduce its EMR emissions. To address concerns about EMR exposure, it's generally recommended to follow guidelines and safety recommendations provided by regulatory authorities and manufacturers of electronic devices.