![](https://coimages.sciencemuseumgroup.org.uk/375/636/large_thumbnail_1928_0920__0001_.jpg)
Replica plane diffraction grating
- Made:
- 1900-1949 (estimated)
- designer:
- Thomas Thorp
![Replica plane diffraction grating, area 23 x 23 mm](https://coimages.sciencemuseumgroup.org.uk/374/633/medium_smg00084547.jpg)
Replica plane diffraction grating, area 23 x 23 mm, mounted on glass plate with label reading 'Thorp's Transparent Replica of Rowland / Metal Diffraction Grating / 14527 lines to the inch, in leathercloth-covered velvet-lined case.