Properties of Waves
Edited by Jamie (ScienceAid Editor), Taylor (ScienceAid Editor)
Above is a displacement / distance graph showing a wave. It is labeled with some key terms.
Parts of a Wave
- 1AMPLITUDE.The amplitude is the height of the wave from 0 displacement (normal) to the peak at its highest point.Advertisement
- 2WAVELENGTH.The Wavelength is the distance from the start to the second point the wave passes 0. i.e. a complete wave.
- 3PERIOD.On a displacement/time graph, the period would be equivalent to the time of the wavelength. The frequency is 1 / period and measured in Hz (1Hz = 1wave per second).
The Wave Equation
Have a look at the examples using this equation, below. A loudspeaker reproduces a note of frequency 320Hz. It travels through the air at the speed of 340ms-1.
A. What is the wavelength in air? l = v/f l = 340ms-1 / 320Hz l = 1.06m
B. The sound passes through water where its wavelength is 4.5m. Calculate the speed of sound in water V = fl V = 320Hz x 4.5m (frequency doesn't change) V = 1,440ms-1
Types of Waves
There are two basic types of wave. They are
- 2Longitudinal Wave.The oscillations/vibrations are along the line of travel. These are mechanical waves because it actually moves particles. E.g. sound waves.Advertisement
- If you have problems with any of these steps, ask a question for more help, or post in the comments section below.
Categories : Waves
Recent edits by: Jamie (ScienceAid Editor)