Hand-Held Spectroscope

Reveal the hidden nature of color and visible light with this durably constructed, economical spectroscope. Measure the wavelengths of visible light from 4000 to 7000 Angstroms with the precision of +/- 50 Angstroms using the built-in scale. Includes a link to instructions that include the history of light theory, diffraction gratings, and suggestions for numerous experiments. 19.5 x 9 x 2.5 cm (7.25" x 3.5" x 1")