When two tones of slightly different frequencies are played in separate ... will depend on its frequency and the corresponding brain wave: Beta waves (13-16 Hz) occur when we are awake and alert.

Interference takes place when two different waves emerge from two different sources. Diffraction takes place when waves emerge from different parts of the same wave. In interference, wavefronts ...

His mission is to find out what different types of wave there are ... beach and his animated sketchbook Jon looks at the two main types of wave: transverse and longitudinal. Sea waves, light ...