Water Refraction Experiment:   In this video, someone uses the law of refraction. When light passes through air, the glass, and the water, the angle the light ray makes with the normal of the surface is changed every time it passes through the different medium.  The glass, the air, and the water have different […]

These are the Constructive Interference. When a crest/trough meets crest/trough from another source, their energies combine to result in  a greater displace, providing a bigger crest/trough. This is the wave that has a destructive Interference. When the crest and the trough meet, they cancel each other out, and the wave becomes flat (it is hard […]

This is mechanical wave because the wave is not repeating; single disturbance. This is periodic waves because the wave is repeating; repeating disturbances.   This is transverse waves because the spring is pulled side ways.   This is longitudinal waves the wave is moving to the same direction as the energy transferred.