Even with the simplest "spectrometer" - a common CD,
one can distinguish light from incandescent bulb (which is continous)
from a neon lamp (in bands) or from sunrise (which is pink) Spectroscopy (2)
You can observe light splitting on sky:
in rainbow, at sunset and sunrise (in light scattering)
Cadine - Trento Itea (Greece)
Monenvasia (GR) Water with milk
but also on shallow water, on snow, in ice, on the beach Sharm-el-Sheik Folgaria
Folgaria
Isola d'Elba