Example – boat in water
According to Galileo, Newton all motion is relative
- Also our common sense – examples ……
- An experiment can detect motion relative to the medium
- Measured from the boat:
- front wave moves at Vwave - Vboat
- back wave moves at Vwave + Vboat
- Difference = (Vwave + Vboat) - (Vwave - Vboat) = 2Vboat