PHY 102 Lecture Notes - Lecture 17: Mechanical Wave, Refraction, Equilibrium Point
Document Summary
Displacement of particles of medium is zero. Medium only moves enough to pass on energy. Particles of medium move perpendicular to motion/ direction of wave. Particles of medium move in same direction as motion/ direction of wave. Amplitude - distance particles move from equilibrium point. Wave energy is proportional to amplitude squared. Intensity is proportional to amplitude squared loudness is proportional to amplitude squared. Wavelength- distance between successive crests or troughs. Frequency- number of waves that passes a point in a second. Period- how long it takes one wave to pass a given point. As the frequency increases the period decreases. As the frequency increases the wavelength will get smaller, shorter. Waves travel a constant speed determined by medium. Speed of wave = wavelength x frequency. Mechanical wave medium combination of density, composition, temperature. The speed of sound in air depends only on temperature. All electromagnetic waves move at 3 x 10^8 m/s.
