Low carbon steels suffer from yield-point runout where the material has two yield points. The first yield point (or upper yield point) is higher than the second and the yield drops dramatically after the upper yield point. If a low carbon steel is only stressed to some point between the upper and lower yield point then the surface may develop Lüder bands.

Yield a hammer in your chosen hand and swing down hard upon the surface??

In photochemical reaction we have photons that passed to the surface starting photochemical reaction - producing some electrons.

quantum yield=produced electrons/passed photons.

Surface bursts and shallow subsurface bursts. The largest craters for a given yield are produced by shallow subsurface bursts at optimal cratering depth for that yield.

Green and red showcase how additive colors function. Red overlapping green will yield yellow, as green and blue yield cyan, and red and blue yield magenta.