Wave Equations. Frequency Frequency is the number of cycles per time second – the unit is hertz. One cycle is measured from peak to peak or trough to.

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Presentation transcript:

Wave Equations

Frequency Frequency is the number of cycles per time second – the unit is hertz. One cycle is measured from peak to peak or trough to trough. 2 cycles per second = 2 hertz

Period Is the time it take for a wave to pass a certain point. Period = 1/frequency or T= 1/f Example if a bird flaps at a frequency of 121 hertz (cycles per second). The period is 1/121 = ~ seconds Frequency equals 1/period 1/ = ~121 hertz

The Wave Equation Speed = Wavelength Frequency

Work out the speed of these slinky waves. MediumWavelengthFrequencySpeed Zinc, 1-in. dia. coils1.75 m2.0 Hz______ Zinc, 1-in. dia. coils0.90 m3.9 Hz______ Copper, 1-in. dia. coils 1.19 m2.1 Hz______ Copper, 1-in. dia. coils 0.60 m4.2 Hz______ Zinc, 3-in. dia. coils0.95 m2.2 Hz______ Zinc, 3-in. dia. coils1.82 m1.2 Hz______