Waves. What is a wave? Waves move energy. Transverse Wave In a transverse wave, the particles move _______________ to the direction of the wave. perpendicular.

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Presentation transcript:

Waves

What is a wave? Waves move energy.

Transverse Wave In a transverse wave, the particles move _______________ to the direction of the wave. perpendicular

Amplitude – maximum displacement Wavelength – distance between 2 consecutive particles in phase Terms to Know om/4.+Transverse+wave om/4.+Transverse+wave In phase – parts of the wave that have the same displacement and are moving in the same direction.

Examples

More Terms! Pulse - The pictures shown have been continuous waves, but there can also be waves caused by a single disturbance. Period – time it takes for a single wave to go by Frequency – how many waves pass in a second Period and frequency are reciprocals

Longitudinal Waves In a longitudinal (or compression) wave, the particles move _______________ to the direction of the wave. parallel

Terms to Know In phase, amplitude, frequency, pulse and period all apply to both wave types!

Examples

So what is a water wave? Transverse or Longitudinal?

Both!

Practice problems Period and frequency es/u10l2b.cfm es/u10l2b.cfm

Wave Speed Wave Speed = wavelength x frequency V = x f Wave speed depends on the medium Practice! /u10l2e.cfm /u10l2e.cfm

Interference su.edu/drussell/d emos/superpositi on/superposition.html on.edu/NAGTWo rkshops/deepear th/activities/ html aka Resonance

So if wave speed depends on the medium, what happens when a wave encounters a different medium? reflection refraction hemistry- physics/physics/ hemistry- physics/physics/1103 3:30-6:00

Properties of sound waves Amplitude Frequency Volume Pitch Which of these terms goes together?

Forced vibrations and natural frequencies

AM and FM radio

Doppler Effect The perceived pitch is different due to waves getting squished together or spread out by the movement of either the thing making the noise or receiving it. physics/physics/ physics/physics/ :30 – 30:00

Doppler effect