Unlike a sound waves, light waves do not need a medium ... 300 000 000 m/s is often written as 3 x \(10^8\) m/s. The very large difference between the speed of light and the speed of sound ...

In order to produce a binaural beat, the two tones sounded in the ears must both have frequencies below 1,500 Hz with a difference of no greater than 40 Hz between ... Beta waves (13-16 Hz ...

FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to ...