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Date: Mon, 22 May 2006 Time: 12:00 AM
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Waves, Transfer of Energy
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Transverse wave: Particle movement 90 degrees perpendicular to the place of rest. The above image is a diagram of a transverse wave. Examples: Radio waves, light waves, x-rays, gamma rays.
Amplitude: Is the loudness
Wavelength: How long the wave is. (In meters)
Frequency: Is the pitch, it is the amoun of times the wave repeats in a set amount of time. (measured in hertz or hz)
Wave speed: frequecy (hz) x wavelength (m)
Longitudinal wave: Where particles move from left to right in direction of wave.
Example: >))))))))>
Light is the vibration of electrons
Reflection: wave bounces off
Refraction: wave bends
Diffraction: wave spreads out after going through a small hole.
Sound Waves
- Compression: when particles come closer together
- RarefactionL when they spread out
- Sound travels best through solids. (particles are closer together)
- Sound reflection is called an echo
- Sound level is measured in decibels
Noise Pollution
- When noises are above acceptable levels.
- Ways to prevent
- Ear muffs
- double glazing
- mufflers
Image from: http://www.gcsescience.com/pwav4.htm
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by: Admin
Total views: 5113
Word Count: 455
Date: Mon, 22 May 2006 Time: 12:00 AM
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