This very economical deluxe handheld quantitative spectroscope allows you to see a very clear, bright spectra form various light sources. The graduated scale on the inside of this spectroscope can also be used to measure the wavelengths of visible light spectra from 4000 to 7000 Angstroms (400 to 700nm) with a precision of +/-50 Angstroms (+/-5nm). Instructions are included.
Note: If you wear glasses and are farsighted, the scale on the inside might appear blurry. Look through the spectroscope again without your glasses and you will see the scale clearly.
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