1. 1 Wave Properties & Types of Waves

2. 2 Wave Wave - Rhythmic disturbance that carries energy through matter and space ALL WAVES CARRY ENERGY! Pulse – one wave that travels through a medium Continuous waves – waves that repeatedly move up and down

3. 3 Transverse Waves Transverse waves – matter in the medium moves back and forth at right angles to the direction that the wave travels.

4. 4 Parts of a Transverse Wave Crest – top of a wave Trough – bottom of a wave

5. 5 Parts of a Transverse Wave Amplitude – ½ the height of a wave Relates to the amount of energy carried by the wave

6. 6 Parts of a Transverse Wave

7. 7 Wavelength – the length of one cycle of a wave Abbreviated by using the symbol, λ

8. 8 Transverse Wave Frequency – how many cycles (waves) are completed in a given time (usually 1 second)

9. 9 Compression/ Longitudinal Waves Compressional waves – matter in the medium moves in the same direction that the wave travels. Example: Sound waves

10. 10 Parts of a compression wave Compression – the area where the particles are more dense

11. 11 Parts of a compression wave Rarefaction – The less dense area of the wave

12. 12 Parts of a compression wave Wavelength – One complete cycle of a wave

13. 13 Surface Waves both transverse & compressional; examples: water waves, seismic waves

14. 14 Medium Most waves need something to travel on (or through) The substance through which a wave travels is a medium

15. 15 Standing Waves Appear to be standing still Standing waves are caused by two waves continuously interfering with each other.

16. 16 Types of Waves…

17. 17 Reflection The angle at which a ray strikes a surface is equal to the angle at which it is reflected

18. 18 Reflection

19. 19 Reflection

20. 20 Reflection

21. 21 Reflection

22. 22 Period and Frequency Period (T) – time it takes for one wave to pass The unit of a period is the second (s) Frequency (f) – the number of waves that pass each second The unit of frequency is Hertz (Hz)

23. 23 Formula 1 Frequency = 1/ period f = 1/T

24. 24 Formula 2 Frequency = # waves / time f = # waves / t

25. 25 Formula 3 Speed = frequency x wavelength S = f x λ