A unit of length equal to 10E-9 meter. Atoms have a radius of 0.1 to 0.2 nm. Wavefunction A function of position and time which is a solution to a differential equation. The distance between successive crests, troughs, or identical parts of a wave. Node Point of zero amplitude in a standing wave.
Antinodes are points of maximum amplitude.
A stationary wave pattern formed in a medium when two sets of identical waves pass through the medium in opposite directions or when the boundaries of the medium are rigid and do not allow transmission. Smoothness condition To be physically realistic, the wave function must be smoothly connected at all points including boundaries where the potential energy changes. This prevents the probability from having two values at a single point. Planck made significant contributions to thermodynamics before he became involved with the problem of blackbody radiation. Planck received the Nobel Prize in 1918.