PHYSICS Mr. BALDWIN WAVES 23-Jan-14
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Transcript of PHYSICS Mr. BALDWIN WAVES 23-Jan-14
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PHYSICS Mr. BALDWIN
WAVES 23-Jan-14AIM: How can the speed & type of a wave be
determined?
DO NOW1. What do waves transport?2. What do all waves have in common?3. What is the frequency of blue light that
has a wavelength of 480 nm?
HOMEWORK: Worksheet: 20.1 Waves
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RECALL: Wave Property Relations
• The frequency is inversely proportional to the period
• WAVE EQUATION: The wave speed is equal to the product between the frequency & wavelength
• Speed of light (E-M)
• ALTERNATE FORMS
1fT
v f
v vff
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Types of Waves: Transverse & Longitudinal
The motion of particles in a wave can either be perpendicular to the wave direction (transverse) or parallel to it (longitudinal).
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Transverse Waves• Transverse waves has propagations in both the
horizontal & vertical directions but perpendicular to wave direction– ex. Light (E-M) waves
• Longitudinal waves have propagation in one direction only (Unidirectional). Particles vibrate parallel to wave direction– ex. Sound waves
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Longitudinal Waves
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Sound waves are longitudinal waves: pressure waves
(Rarefaction)