Simple Spectrophotometer Schematic
ØThe lamp emits all colors of light
(i.e., white light).
ØThe monochromator selects one
wavelength
and that 
wavelength is sent through the sample.
wavelength is sent through the sample. ØThe detector detects the wavelength of
light that has passed through the sample.
passed through the sample.ØThe amplifier increases the signal so
that it is easier to
read
against the background noise.