1. Wave Properties

2. Objectives Content: SW describe the five parts of a wave. Language:
SW take notes on waves and participate in wave examples.

3. 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

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

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

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

7. Parts of a Transverse Wave

8. Parts of a Transverse Wave
Wavelength – the length of one cycle of a wave
Abbreviated by using the symbol, λ

9. Transverse Wave
Frequency – how many cycles (waves) are completed in a second

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

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

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

13. Parts of a compression wave
Wavelength – One complete cycle of a wave λ

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

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

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

17. Types of Waves…
A B
C D

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

19. Reflection (line drawn perpendicular to the reflecting surface)
normal line

20. Reflection
(ray that bounces
off of a surface)
Reflected ray

21. Period and Frequency Period (P) – 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)

22. Formula 1
Frequency = 1/ period
f = 1/T
Write this down 1 P F

23. Formula 2 V F λ Velocity = frequency x wavelength V = F x λ
Write this down V F λ