Search results for "Photometer" - New World Encyclopedia
From New World Encyclopedia
- during his flight in Friendship 7 as he uses a photometer to view the sun]] [[File:John Glenn parade NASA.jpg|thumb|right|250px|Glenn (center ...55 KB (7,935 words) - 02:28, 9 February 2023
- The development of the photoelectric photometer allowed very precise measurements of magnitude at multiple wavelength intervals. In 1921 Albert ...80 KB (12,078 words) - 15:50, 27 April 2023
