Diffraction Grating Film for using the make Spectroscopes.
This pack contains 2 sheets that are 6 x 12 inches. There are 12,700 Lines/Inch (500 lines per mm)
Diffraction Grating Film for using the make Spectroscopes.
This pack contains 2 sheets that are 6 x 12 inches. There are 12,700 Lines/Inch (500 lines per mm)