mechanical vs. electromagnetic waves
Post on 23-Feb-2016
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Mechanical vs. Electromagnetic Waves
Mechanical Waves
• Waves that require a material medium
• Examples include water, sound, and waves along a spring or rope
• These materials carry the energy of the wave
Electromagnetic Waves
• Waves that DO NOT require a medium for motion
• Examples include light waves, radio waves, and X-rays
• All electromagnetic waves travel through space at the speed of light
• Since these waves can’t be observed, we study mechanical waves
Electromagnetic Waves
Waves
Mechanical Waves
Transverse Waves
Longitudinal Waves
Surface Waves
Electromagnetic Waves
Transverse Waves
• Particles of medium vibrate perpendicular to the direction of the motion of the wave
• Examples include guitar strings, waves in piano strings
Longitudinal Wave
• Particles of medium to move parallel to the direction of the wave
• Examples include sound waves, waves through fluids, liquids, gases or plasma
Surface Waves
• Mixture of transverse and longitudinal waves
• Example: At the surface of the water, particles move parallel and perpendicular to the direction of the wave.
Earthworm Examination
• Grab an earthworm from the vermicompost. Study the movement and decide whether an earthworm moves by longitudinal, transverse, or surface waves...
Types of Waves
• Using materials around the classroom, set up a demonstration showing a:– Transverse Wave– Longitudinal Wave– Surface Wave
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