But blocking any of it is useless because none of it is going into your head, the wavelength of the radio waves is too large to penetrate skin or bone, it bounces off harmlessly like am/fm radio waves. It’s in the nonionizing range of the em spectrum, unlike ionizing em waves like X-rays, gamma rays, radon emissions, etc that do penetrate human bodies and can cause protein or DNA damage.
actually no, some of it gets absorbed. that’s why there are SAR values available for all cellphones. it measures how many watts of heat get absorbed per kilogram of brain.
since it’s non-ionizing though, the only effect is a slight heating. like microwatts of heating. 15 minutes in direct sunlight is equal to millions of phone calls. but we do measure it!
No question it causes a little heat when it bounces off and the heat is absorbed, but if that heat gets to the point where you’re causing damage cooking yourself with a phone the phone is seriously malfunctioning and broken.
