Determining Wave Speed. Universal Wave Equation. Example – calculate wave speed. A harp string supports a wave with a wavelength of 2.3m and a frequency of 220.0 Hz. Calculate its wave speed. Example – calculate wavelength.
A harp string supports a wave with a wavelength of 2.3m and a frequency of 220.0 Hz. Calculate its wave speed
A: Wave pulse heading towards a wall.
B: Wave pulse heading towards a “free end”.
B: Wave pulse travelling from a thicker rope into a thinner rope.(More Dense Less Dense, Slower Faster)
A: Wave pulse travelling from a thinner rope into a thicker rope.(Less Dense More Medium, Faster Slower)
What are some other properties of waves?
A water wave incident on a barrier.
The dotted line is called the “normal”. The normal line by definition is perpendicular to the barrier.
All angles are measured from the normal.
When water waves travel from deep to shallow water, the speed of the wave decreases.
Since the frequency of waves is constant, because the wave’s speed decreases, its wavelength decreases. (Why?)
Waves travelling from a faster to a slower medium always bend towards the normal.