Richard: Do you think I might be confusing the wave amplitude with the wavelength? Is'nt the wavelength about 1 cm?
John >> I think in the case of my shadow sharpener, the effect of the diffraction of >> light waves comes into play here. If I remember from high school physics, >> the amplitude of a wave of visible light is about 1 mm. or ~1/16" (I think). > > green light is about 500 nanometers wavelength or .0005 mm > >
