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Determining wave frequency from a graph. f Frequency = #of cycles/time Measured in Hertz (Hz)

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Presentation on theme: "Determining wave frequency from a graph. f Frequency = #of cycles/time Measured in Hertz (Hz)"— Presentation transcript:

1 Determining wave frequency from a graph

2 f Frequency = #of cycles/time Measured in Hertz (Hz)

3 1 cycle = 1 full wave to repeat itself

4 31 2 4 56789101112 Time in seconds 3 cycles

5 from 0 to 12 seconds 31 2 4 56789101112 Time in seconds 0

6 f=3  s = ¼ Hz 31 2 4 56789101112 Time in seconds

7 Or determine the time for 1 full wave cycle

8 1 cycle in 4 seconds= ¼ Hz 31 256789101112 Time in seconds 04

9 Period symbol T The time for 1 cycle

10 The period for 1 wave is 4 seconds T=4 31 2 4 56789101112 Time in seconds

11 What is the frequency? 0246 810 12 14 16 18 20 Time in seconds 2224

12 ? 0246 810 12 14 16 18 20 Time in seconds 2224 3 cycles 0 to 24 seconds

13 0246 810 12 14 16 18 20 Time in seconds 2224 3 cycles 0 to 24 seconds 3/24 s= 1/8 Hz

14 OR Frequency – 1 cycle in x seconds

15 f=1 cycle in 8 seconds= 1/8 Hz 0246 810 12 14 16 18 20 Time in seconds 2224

16

17 On a piece of paper number 1 through 3 and determine the frequency of the following waves.

18 #1 f= ? 0 12 34 5 678910 1112 Time seconds

19 #2 f= ? Time seconds 02 4 6 81012 1416 18 2022 24 26

20 #3 f = ? 0 5 1015 20 2530 35 40455055 606570 Time seconds

21 Check your answers

22 #1 f= 1/8 Hz 0 12 34 5 67910 1112 Time seconds 8

23 #2 f= 1/8 Hz Time seconds 02 4 6 1012 1416 18 2022 24 268

24 #3 f = 1/20 Hz 0 5 1015 2530 35 40455055 606570 Time seconds 20

25


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