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The Period , or the time it takes for wave to complete on wavelength, is related to ____________

Frequency. The Period , or the time it takes for wave to complete on wavelength, is related to ____________. A wave has a frequency of 40 hertz. What is the period of the wave?. Know: Find: Formula: Answer:. f = 40hertz. Period. T = 1/ f. T = 1/f = 1/40 = 0.025s.

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The Period , or the time it takes for wave to complete on wavelength, is related to ____________

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  1. Frequency ThePeriod, or the time it takes for wave to complete on wavelength, is related to ____________

  2. A wave has a frequency of 40 hertz. What is the period of the wave? • Know: • Find: • Formula: • Answer: f = 40hertz Period T = 1/ f T = 1/f = 1/40 = 0.025s

  3. A wave has a period of 2 seconds. What is the frequency of the wave? • Know: • Find: • Formula: • Answer: T = 2s frequency f = 1/ T f= 1/T = 1/2 = 0.5Hz

  4. The only thing that affect wave speed is the medium We can use two properties of a wave to calculate the speed: • Frequency- (how many waves per second) • Wave Length- (distance between waves)

  5. Finding Speed of a Wave

  6. The wavelength for a wave is 0.5 meter, and its frequency is 40 hertz. What is the speed of the wave? • Know: • Find: • Formula: • Answer: f = 40hertzƛ = 0.5m Speed v = fƛ v = 40hrtz x 0.5m = 20m/s

  7. The period of a wave is 10 seconds and the wavelength is 2 meters. What is the wave speed? • Know: • Find: • Formula: • Answer: T = 10s ƛ = 2m Wave Speed v = f ƛ v = f ƛ = f = 1/T = 1/10 = 0.1hz v = 0.1hrtz x 2m = 0.2m/s

  8. Can rearrange formula to solve for either frequency or wavelength

  9. A sound wave has a speed of 400m/sec and a frequency of 200Hz. What is its wavelength? • Know: • Find: • Formula: • Answer: v = 400m/sf= 200Hz Wavelength v =fƛ v/f = fƛ/ f ƛ = v/f = 400/200 =2m

  10. Summarizer: Try these on your own!

  11. Johnny is making waves on a slinky. It takes 0.5s for one complete wavelength. The wavelength of the waves is 2m. What is the speed of the waves John-boy made?

  12. Johnny now creates waves with a speed of 3m/s, with a wavelength of 0.25m. What is the frequency of the waves? What is the period of the waves?

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