A shallow container holds water on the over head projector. Various attachments can be used to illustrate wave behavior:
Striaght line propagation
Point sources
Straight wave fronts
Periodic waves & standing waves.
Reflection of straight and curved waves
Refraction with speed change(depth change)
Lenses
Diffraction
Two point source interference patterns
Double slit interference
Question:
How does the wave cause conentration of light?
Would this work on the moon?
