hertz effect मीनिंग इन हिंदी

The researches of Langevin and those of Eugene Bloch have shown that the greater part of the Lenard effect is certainly due to this'Hertz effect '.
With regard to the " Hertz effect ", the researches from the start showed a great complexity of the phenomenon of photoelectric fatigue that is, the progressive diminution of the effect observed upon fresh metallic surfaces.