It predicts that electrons should show diffraction effects with crystals ... energy is regarded as replaced by a train of waves the wave-length X of which is given by X=(Planck's constant A ...

Diffraction affects radio and television signals. Long wave radio signals are much less affected by buildings, hills, tunnels etc. than those of short wave or VHF radio, or television.

The global ocean economy is at risk of major disruption without increased protection, according to the Organisation for Economic Co-operation and Development (OECD). The global ocean economy had ...

Like ocean waves, these ripples are transverse waves because the surface of the water moves up and down, at 90° to the direction that the wave is travelling. Water waves can reflect or ‘bounce ...