The Condition that the Ratio of the Intensities of the Transmitted and Reflected Electric Waves at the Interface between Two Media Is Independent of their Plane of Polarisation

H. M. Macdonald
1925 Proceedings of the Royal Society A  
I t lias been shown th a t the condition th a t a steady state of electrical oscilla tions can be set up in a comparatively short time in a space, whose outer boundary separates two dielectric media with different electric constants, is th a t the ratio of the specific inductive capacities of the two media is approxi mately equal to the ratio of the magnetic permeabilities. This suggests that, when the ratios are equal, the ratios of the incident, transm itted, and reflected disturbances are
more » ... disturbances are independent of the direction of the plane of polarisation of the incident disturbance, and this can be readily verified. The object of the present communication is to prove th a t the condition is necessary, th a t is, the condition th a t the ratios of the intensities of the incident, transmitted, and reflected electric waves a t the interface between two media is independent of the direction of the plane of polarisation of the incident waves is th a t the ratio of the specific inductive capacities of the two media is equal to the ratio of the magnetic permeabilities of the two media.
doi:10.1098/rspa.1925.0083 fatcat:g67pq6hswng2jmkwn5rztyfphi