4 Replacement High Quality LED's for Planck's Constant Kit.
Colour / Wavelength (m)
- Red 6.24 x10^-7
- Yellow 5.91 x10^-7
- Green 5.27 x10^-7
- Blue 4.70 x10^-7
4 Replacement High Quality LED's for Planck's Constant Kit.
Colour / Wavelength (m)