Abstract
MARCH 28.—Supplementing my letter of March 20 on the remarkable optical properties of the alkali metals in the ultra-violet region, I am now able to state that my prediction that potassium would show a Brewsterian angle of plane polarisation in the region below 2700 A. has been verified. The angle found for 2500 A. was 37°, which makes the refractive index n = 0.75. I am not yet sure how accurately the angle can be determined, or how complete the polarisation is, but the intensity ratio of the two images obtained with a quartz Rochon prism was 1 : 120. The images had equal intensity in the visible and near ultra-violet.
Similar content being viewed by others
Article PDF
Rights and permissions
About this article
Cite this article
W, R. Remarkable Optical Properties of the Alkali Metals. Nature 131, 582 (1933). https://doi.org/10.1038/131582b0
Issue Date:
DOI: https://doi.org/10.1038/131582b0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.