5 0 D O C . 6 X - R AY R E F R A C T I V E I N D I C E S
6. “Is It Possible to Determine Experimentally the
X-Ray Refractive Indices of Solids?”
[Einstein 1918i]
Received 21 March 1918
Published 30 June 1918
In: Deutsche Physikalische Gesellschaft. Verhandlungen 20 (1918): 86–87.