1. WAVES

2. WHAT IS A WAVE?

3. A WAVE IS…
Any disturbance in a solid, liquid, or gas that transmits energy through matter or empty space.

4. Mechanical Waves Electromagnetic Waves
Need a medium to travel through
EXAMPLES:
(Transverse waves and Longitudinal waves) ocean waves,Seismic waves, sound waves
Energy transfer without a medium
EXAMPLES:
Light waves, microwaves, X rays
Medium – substance through which a wave can travel. A medium can be solid, liquid, or gas.

5. TRANSVERSE WAVES
Description: Wave in which the particles of the medium move perpendicularly to the direction the wave is traveling.

6. PARTS OF A TRANSVERSE WAVES
Crest – highest point of a transverse wave
Trough – lowest point between each crest
Crest
Trough

7. crest
1 wavelength
1 wavelength
Wavelength is:
trough
The distance from one crest of a wave to the next crest, or from one trough to the next trough

8. 1 2 3
3 seconds
Frequency is:
The number of full wavelengths that pass a point at a given time interval
Frequency = # of waves period

9. Amplitude
Amplitude is the greatest distance between the resting point of a particle and it’s displacement (i.e.—the top of the crest or trough). The larger the amplitude, the taller the wave.
amplitude

10. Wave Speed is: Wave speed is the speed at which a wave travels.
Wave speed= wavelength x frequency
When the frequency increases, the wave speed increases.
When the frequency decreases, the wave speed decreases.

11. Human Wave Activity High Frequency, Low Amplitude
Low Frequency, Low Amplitude
Low Frequency, High Amplitude
High Frequency, High Amplitude
Which one requires (has) the highest energy?