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SPECTROSCOPE IEC
The IEC compact Direct Vision Spectroscope is a very useful
device for measuring the wavelength of light. An adjustable slit allows the
light to enter the black chamber and the viewing eyepiece carries a 600 line/mm
grating. The eye sees the incoming light split into its colours or wavelengths
that appear to be deflected to the right hand side. The coloured bands appear
over a scale calibrated in nanometres (nm) with each digit on the scale
representing 100nm.