Waves and Sound: 77
Transverse wave particles vibrate perpendicular to the wave direaction
and longitudinal wave particles vibrate parallel to the direction of the wave propagation.
Waves and Sound: 78
Sound waves are mechanical longitudinal waves.
Light waves are electromagnetic transverse waves.
Waves and Sound: 79
The speed of a wavedepends only on the properties of the medium.
Waves and Sound: 80
The energy of a wave is directly proportional to the square of the amplitude.
Waves and Sound: 81
The intensity of sound is inversely proportional to the distance.
Waves and Sound: 82
When two or more waves exist simultaneously in the same medium, the resultant amplitude at any point is the algebraic sum of the amplitudes of each wave.
Waves and Sound: 83
The harmonics produced in open pipes are similar to those produced in strings. The fundamental occurs when the lenght of the pipe (or string) equals 1/2 λ.
Waves and Sound: 84
The fundamental on a closed pipe occurs when the length of the pipe equals 1/4λ. Only the odd harmonics are possible for a closed pipe.
Waves and Sound: 85
Whenever two waves exist simultaneously in the same medium and they are nearly at the same frequency, beats are set up.
Waves and Sound: 86
Doppler effect is the apparent change in frequency of a source of sound when there is relative motion of the source and the listener.
Some Physic Concepts