>> Education  |
| General Information |
| Information about Astronomical studies |
| Courses (Univis) |
| An Introduction to Spectroscopy |
>>An Introduction to Spectroscopy |
What can we learn about stars?
 | At the end of a telescope a Spectrograph is mounted, throughwhich starlight is recorded. |
Light
is split into spectral colours, corresponding to wavelength. Red light has long wavelengths,blue light has short wavelengths.
Spectra
from hot objects are continuous, like a rainbow
atoms only emit light of specific colours, revealingtheir fingerprints as a line spectrum
atoms in front of a hot object absorb light at these colours, giving an absorption spectrum
