Final answer:
The stages of a spectrometer in order of light flow are: narrow slit or hole, lens, prism, second lens, and CCD or detecting device.
Step-by-step explanation:
Spectrometer Stages in Order of Light Flow
- Narrow slit or hole: Light from the source enters the spectrometer through a small hole or narrow slit.
- Lens: The light is collimated (made into a beam of parallel rays) by a lens.
- Prism: The light passes through a prism, which separates the different wavelengths of light and produces a spectrum.
- Second lens: A lens placed behind the prism focuses the different images of the slit or entrance hole onto a detecting device.
- CCD or detecting device: The spectrum, spread out by color, is then analyzed at a later point using a CCD or other detecting device.