N. S. Nagendra Nath

The diffraction of light by high frequency sound waves. Part I.

SummaryThe theory developed in Part I of this series of papers has been developed in this paper to find the Doppler effects in the diffraction components of light produced by the passage of light through a medium containing (1) a progressive supersonic wave and (2) a standing supersonic wave. (1)In the case of the former the theory shows that the nth order which is inclined at an angle

The neutrino theory of light

\sin ^{ - 1} \left( { - \begin{array}{*{20}c} {n\lambda } \\ {\lambda *} \\ \end{array} } \right)

Neutrino Theory of Light

to the direction of the propagation of the incident light has the frequencyv – nv* wherev is the frequency of light,v* is the frequency of sound andn is a positive or negative integer and that thenth order has the relative intensity

Neutrinos and light quanta

Jn^2 \left( {\frac{{2\pi \mu L}}{\lambda }} \right)

The diffraction of light by high frequency sound waves: Generalised theory

where μ is the maximum variation of the refractive index, L is the distance between the faces of the cell of incidence and emergence and λ is the wave-length of light.(2)In the case of a standing supersonic wave, the diffraction orders could be classed into two groups, one containing the even orders and the other odd orders; any even order, say 2n, contains radiations with frequenciesv ± 2rv* wherer is an integer including zero, the relative intensity of thev ± 2rv* sub-component being