1. Mechanical vs. Electromagnetic Waves

5. 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

6. 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

7. Electromagnetic Waves

8. Waves Mechanical Waves Transverse Waves Longitudinal Waves Surface Waves Electromagnetic Waves

9. Transverse Waves Particles of medium vibrate perpendicular to the direction of the motion of the wave Examples include guitar strings, waves in piano strings

10. 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

11. 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.

12. Earthworm Examination Grab an earthworm from the vermicompost. Study the movement and decide whether an earthworm moves by longitudinal, transverse, or surface waves...

13. Types of Waves Using materials around the classroom, set up a demonstration showing a: – Transverse Wave – Longitudinal Wave – Surface Wave