Physics
Scientific paper
Jan 1969
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969natur.221..162p&link_type=abstract
Nature, Volume 221, Issue 5176, pp. 162 (1969).
Physics
2
Scientific paper
I HAVE tested the accepted theory that there is a strong inverse relationship between brightness and polarization on the lunar surface, by measuring the polarization of several examples of ``pure'' maria (dark and light), highlands and mountains in five passbands with a photoelectric Wollaston polarimeter. The effective central wavelengths were 3360 Å, 3640 Å, 3830 Å, 4500 Å and 5340 Å and the bandwidths (half-response points) ranged from 330 to 560 Å. The short wavelengths are uncertain (+/- 30 Å) because of unknown atmospheric extinction. Observations of the 30 s of arc diameter regions were made within a sufficiently short period of time during each observing session that the lunar phase angle (-107°) did not change by more than +/-1.5°. The probable error was +/-0.06 per cent in polarization. The observations were made on June 14, 1967, and May 4, 1968, UT. Some of the regions were measured on both dates.
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