Ultimately, energy is radiated in the form of longwave infrared radiation back into space. Electromagnetic waves are radiated by electric charges when they are accelerated. The balance between absorbed and radiated energy determines the average global temperature. More than 85% of its radiated power is at infrared wavelengths. A vibrating crystal creates ultrasonic waves that are radiated into the medium. Remote observation of electrons requires detection of their radiated energy. Radio waves are radiated by electric charges undergoing acceleration. Heat must be radiated from their surfaces. The power supplied to the antenna terminals which is not radiated is converted into heat. Radio waves are radiated by electric charges when they are accelerated. Provision was made to reduce radiated electrical and magnetic fields. This heat is then evenly radiated for many hours during the second phase. The signal is radiated in a cardioid pattern. Note that only odd harmonics are radiated on-axis, and as increases higher harmonic becomes stronger. It relates the power radiated by the particle to its acceleration.