1. What do all of these pictures have in common? Sound / microwaves etc

2. Core Physics – Energy L/O :- To understand what waves are and how they transfer energy “” Exam Date -

3. What does the Ruben’s Tube show us?

4. There are 2 types of wave Longitudinal Waves The energy travels in the same direction as the movement Transverse Waves The energy travels in a different direction to the movement Transverse waves can travel through a vacuum Which type of wave do you think sound is? Sound must be a longitudinal wave because it cannot travel through a vacuum. Sound travels by passing vibrations through particles (movement in the same direction as the energy) Which type of wave do you think light is? Light must be transverse because it travels from the sun to the earth through space which is a vacuum

6. What are the different parts of the wave called? Amplitude This affects the volume of the sound Wavelength (m) This affects the pitch of the sound Frequency Hz (number of waves per second) This affects the wavelength and pitch

7. Do all waves travel at the same speed? All E-M waves obey the Wave Equation: Wave speed (v) = frequency (f) x wavelength ( ) in m/s in Hz in m V f

8. Some Calculations b) If the same waves travels across the pond at a speed of 5m/s, what is their wavelength? c) hack wants to see what happens if he throws Jill into different ponds. Finish off his results PondFreq (Hz) WL (m) V (m/s) A200.3 B27 C51.2 D0.45 These waves all have a wavelength of 12m. What is their velocity? a) 2Hz b) 5Hz c) 0.5Hz d) 1000Hz These waves all have a frequency of 10Hz. Use their velocity to work out the wavelength a) 3m/s b) 2500m/s c) 0.2m/sd) 100cm/s Jack threw his annoying little sister Jill in the garden pond. Jill made a large splash and waves rippled across the pond. a) If it takes 2 seconds for a full wave to pass, what is the frequency?

9. If you were a wave, what would your wavelength be???? What about your frequency??? Your Wavelength could be your stride Your Frequency would be the number of strides per second So how could you work out your speed? How could you check your calculations?

10. Why do all of these pictures represent waves?