The key innovation is that sound is only generated where two beams intersect, making it possible to deliver audio to a ...

IN order to compare the diffraction pattern of a substance of unknown characteristics with that of a known material, Shishancow and Tartarinowa 1 suggest using two convex specimens mounted face to ...

Controlling where sound goes is difficult because of a phenomenon called diffraction – the tendency of sound waves to spread ...

The wavelength is unchanged after diffraction. A gap width similar to the wavelength of the waves passing through causes a lot of spreading, eg sound waves passing through a doorway. The greater ...