A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Zone plate
The optical device which verifies rectilinear propagation of light approximately by wave theory.

Zeroeth Law of Thermodynamics
This law was first enunciated by R H Fowler in 1831. According to this law when two systems A and B are in thermodynamic equilibrium with another system C, then A & B will also be in thermal equilibrium.