Function
of Spectrophotometer Parts
Wavelength selectors:
1. Allows for the selection of desired wavelength of light
2. Types of selectors:
Filters – glass or
gelatin
Instrument is called a
photometer
Monochromators:
Prisms or etched
plates (grating)
Instrument is called a
spectrophotometer
Entrance slit:
Focuses the light on the
monochromator
Reduces the amount of
stray light hitting the prism or grating