5) Waves
a) Mechanical
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Long Spring Attached to the Wall
Shows basic wave properties such as wave length, amplitude,
pulses, Standing waves
and speed as related to tension for transverse waves.
Similar to long spring (some just prefer the rope but
I don't think it works as well)
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Long Slinky Across Desktop
Shows longitudinal waves and their characteristics.
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Fixed and free End Wave Demonstrator (torsion wave model)
Shows wave reflections from fixed and free ends using
a metal grill the looks like a
barbecue grill.
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Longitudinal Wave Demonstrator with Magnets
Shows longitudinal waves with magnets repelling each
other to transmit the wave.
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Superposition Principle Demonstrator
Very clearly shows wave addition with waves forms moved
back and forth in the model.
Shows transverse, longitudinal, and combination (transitional
+ longitudinal) water waves
side by side as they move.
b) Electromagnetic
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Microwave Transmitter and Receiver
Shows energy transmission through space by electromagnetic
waves.
Reflection of electromagnetic waves form the surfaces
can be also shown.
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Radiowave Transmitter and Receiver
Shows energy transmission through space of electromagnetic
waves and reception by an
antenna.
Signal strength is indicated by a light bulb on the antenna.
Antenna position and angle can be shown to effect reception.