Photovapor is an analogy of photoelectron. Temperature dependence of W6 and W5 population of water cluster had been emphasized for the explanation of the mechanism for the Evaporation of water. Photovapor is an analogy of Photoelectron. If incindence angle of photon on the surface of water is very oblique, photovapor of Dangling bond water molecules might have antiparallel spin normal to the incidence plane.