1. The Wave Equation
Aim
Be able to use the wave equation in calculations

2. Wave speed (v) = frequency (f) x wavelength ()
The Wave Equation
Wave speed (v) = frequency (f) x wavelength ()
in m/s in Hz in m v f 

6. Questions – wave equation
Main activity
Questions – wave equation

7. Some example wave equation questions
A water wave has a frequency of 2Hz and a wavelength of 0.3m. How fast is it moving?
A water wave travels through a pond with a speed of 1m/s and a frequency of 5Hz. What is the wavelength of the waves?
The speed of sound is 330m/s (in air). When Dave hears this sound his ear vibrates 660 times a second. What was the wavelength of the sound?
Purple light has a wavelength of around 6x10-7m and a frequency of 5x1014Hz. What is the speed of purple light?

8. Question 1 What is the wavelength of a sound wave with a frequency of 500Hz? (Speed = 330 m/s)
0.66m 0.78m 1.23m 1.5m
Question 2 A sound wave passes through a solid wall. It has a wavelength of 0.25m and travels at 400m/s. What is it's frequency?
325 Hz 450 Hz 1200 Hz 1600 Hz
Question 3 A sound wave travels through a liquid with a wavelength of 0.8m and a frequency of 500Hz. What speed is the wave travelling at? 330 m/s 400 m/s 500 m/s 625 m/s

9. Some example wave equation questions
A water wave has a frequency of 2Hz and a wavelength of 0.3m. How fast is it moving?
A water wave travels through a pond with a speed of 1m/s and a frequency of 5Hz. What is the wavelength of the waves?
The speed of sound is 330m/s (in air). When Dave hears this sound his ear vibrates 660 times a second. What was the wavelength of the sound?
Purple light has a wavelength of around 6x10-7m and a frequency of 5x1014Hz. What is the speed of purple light?
0.6m/s
0.2m
0.5m
3x108m/s

10. Question 1 What is the wavelength of a sound wave with a frequency of 500Hz? (Speed = 330 m/s)
0.66m 0.78m 1.23m 1.5m
Question 2 A sound wave passes through a solid wall. It has a wavelength of 0.25m and travels at 400m/s. What is it's frequency?
325 Hz 450 Hz 1200 Hz 1600 Hz
Question 3 A sound wave travels through a liquid with a wavelength of 0.8m and a frequency of 500Hz. What speed is the wave travelling at? 330 m/s 400 m/s 500 m/s 625 m/s