[ireton] 



SELECTED RADIATION'S 



133 



In Fig. 2 this process of radiation has been illustrated diagram- 

 matically for certain series lines. The circles represent stationary 

 orbits for the revolving electrons, that is, when an electron is revolving 

 in one or other of these orbits it is supposed not to radiate. Radiation 

 is emitted according to the theory when an electron passes from an 

 outer orbit to an inner one and when radiation is absorbed an electron 

 is lifted from an inner to an outer orbit. For example, the wave 

 lengths X = 5460.97 Â.U., X = 4358.6G Â.U., and X = 4046.78 Â.U. may 

 be represented by electrons passing from the (1.5, s) orbit to the 

 (2, pi), (2, p.,), and (2, ps) orbits; the wave length X = 2536.72 Â.U. 

 by an electron passing from the (2, p») orbit to the (1.5, S) orbit, the 

 wavelength X= 10141 A.U. by an electron passing from the (2.5, S) 

 orbit to the (2, P) orbit. 



4-55' 



5LECTRON/C 0/?S/rS - MERCURY /ITOM 

 Fig. 2. 



