Grating Spectroscope.
Plastic, direct vision student spectroscope, fitted with a high efficiency
grating in the eyepiece which produces a brilliant spectrum even in
poor light. The adjustable slit permits maximum resolution and the
sharpest bands at predominant wavelengths, viewed directly against a
scale graduated in nanometres. The outer surface of the calorimeter
has the wavelength of some commonly found spectra. Dimensions
195mm x 98mm x 25mm.