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Title: Concave diffraction grating on speculum metal, grating area [Go to resource]
Description: Concave diffraction grating on speculum metal, grating area 27 x 19 mm, on black enamelled metal stand with three levelling feet, fine adjustment for setting grating vertical, and sliding metal cover for grating, signed 'ADAM HILGER LTD / LONDON', estimated date 1910-1948. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: diffraction grating - reflection Temporal: 1910-1948 (estimated) Source: Science Museum Creator: Adam Hilger Ltd Identifier: 2000-1451 Go to resource More Like this...
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