I can't speak for the reliability of the remote sleep tracker, which purports to identify circadian rhythms
via electromagnetic waves and then maps them on an app.
Not exact matches
It was the first cosmic event in history to be witnessed
via both traditional telescopes, which can observe
electromagnetic radiation like gamma rays, and gravitational
wave detectors, which sense the wrinkles in space - time produced by distant cataclysms.
GW170608 is the lightest black hole binary that LIGO and Virgo have observed — and so is one of the first cases where black holes detected through gravitational
waves have masses similar to black holes detected indirectly
via electromagnetic radiation, such as X-rays.
It works on the premise that every cell in the body emits
electromagnetic waves, and «communicates»
via specific frequencies.