Sinusoidal Waves

• y(x,t)=ym sin( kx- ? t) describes a wave moving right at constant speed v= ?/k

• ? = 2?f = 2?/T k= 2?/?

• v = ?/k = f ?= ?/T

• wave speed= one wavelength per period

• y(x,t)=ym sin( kx+ ?t) is a wave moving left

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