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Waves
Slinky Waves A wave is caused by a vibrating source, and travels outwards from the source. The particles of the medium through which a wave travels move about their equilibrium positions; they do not move along with the wave. Energy is transferred from place to place by a wave.
To think about ,[object Object],[object Object],[object Object],[object Object],[object Object]
What you are going to achieve today ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Important wave diagram
Radians and waves
Phase Dual pendulums to demo phase
Phase Demo
Phase on the oscilloscope
V = f  λ ,[object Object],[object Object],[object Object],λ c = f  λ  is used for electromagnetic waves as the velocity of light is always 3 x 10 8  m/s
All go at the speed of light
Speed, wavelength and frequency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The speed of sound in air 330 m/s  speed of light 3 x 10 8  m/s. s  =  v  ∆ t
Answers ,[object Object],[object Object],6) s  =  v  ∆ t  = 330 x 1.5  = 495 m, light transit time is negligible
Polarisation Polarisation can only happen with transverse waves http://www.youtube.com/watch?v=qlRriWu1zOI&feature=related http://www.youtube.com/watch?v=ozTH2zIKwC0&feature=player_embedded
3D glasses
The water tubs waves in another medium ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
CHALLENGE! Demonstrate longitudinal and transverse waves In a group of 5 demo both types of wave

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Waves.pptx