Minggu, 09 Desember 2012

Vibrations and Waves

I. VIBRATION

1. understanding Vibration
Vibration is a back and forth motion or periodic motion around a particular point periodically.
Periodic motion is a vibration or movement made objects back and forth through a certain path back to each position and velocity after a certain time interval. Deviation is the distance between the position of objects that vibrate at a time until it returns to the position of the imbalance.
Amplitude is the maximum deviation performed on vibration events.
Period is the time it takes to make one complete vibration.
Frequency is the number of full vibration to do in one second.

II. understanding waves
The waves are vibrations that propagate. For example, when we move the end of the rope up and down, the vibration that we do will propagate, so the waves will form a rope. Based on the need for the medium, the waves can be divided into two electromagnetic waves and mechanical waves.
Electromagnetic waves are waves that do not require a medium / intermediate. For example, light is a wave. Sunlight can get to the earth, but at the top of the atmosphere is a vacuum / vacuum, no medium to propagate Whatever. It was proved that light does not need a medium to propagate, so that the light belongs to the electromagnetic waves. While the mechanical wave is a wave that requires a medium / intermediate to propagate. An example is a rope wave, sound waves, sea waves, and so on.


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