Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science December 1953

The measurements of the initial jumps of the primary current ate used to obtain an idea of the degree of excitation produced by the different radiations of the F-centres. [...] The variation in current under the influence of white light as seen in figure 3 shows that the difference between the final value of the current and the dark current is more than twice that in the case of green light. [...] It is because of the simultaneous flow of the positive primary current along with the ordinary flow that the final value of the current in the case of white light is more than double that in the case of green light. [...] The fact that even in the case of the solid state in which the arrangement of the molecules is regular the bands are broad shows that some sort of oscillatory motion of the molecules is responsible for the larger width of the bands and that such motions do not cease even at -18o°C. [...] (r) the resistance of the connecting link to the earth connection and of the material of the earth connection itself (2) the contact resistance between the metal of the earth connection and the surrounding earth and (3) the resistance of the earth surrounding the earth connection.