This post covers interference and refraction. Interference happens when two waves pass through each other. Simply add the amplitudes point by point at any instant. Refraction ocurs when a wave front moves from one material to another and the wave’s velocity changes.
Standard:
| Standard: 4 a-d, f | What are waves? Waves carry energy Transverse and longitudinal waves, seismic and ocean waves Wavelength, frequency, and wave velocity Sound waves, music Beats, diffraction, refraction, resonances The Doppler Effect |
Learning Objectve: to understand the phenomenon of refraction in water waves.
Wave interference and standing waves (nodes, anti nodes)
A simple – quick demonstration of constructive ad destructive interference;
The wave machine demonstration:
Refraction:
Refraction:
Refraction of water waves around a beach makes for great surfing!
Question: Why does the wave crest “A” frame? sketch the ocean bottom in the vicinity of the break.
Class review: Holt page 438-439 #1-14 (skip # 10)