AstroMedia offers a plentiful choice of interesting and affordable, mainly cardboard based construction kits for scientific instruments with focus on astronomy. After assembling the refractor telescope for 30 Euro, my second project was the hand sprectroscope for 8 Euro.
The Fraunhofer lines (dark absorption lines in the sunlight spectrum) are difficult to see and even more difficult to photograph, but the following lines are observable with some exercise:
Line | Cause | Color | wavelength (nm) | display (nm) |
G | Fe | blue | 430.8 | 430 |
F | H (β) | blue | 486.1 | 483 |
b | Mg (triplet) | green | 517-518 | 517 |
E | Fe | green | 527 | 526 |
D | Na | yellow | 589-590 | 584 |
a | O2 (terrene) | red | 628-629 | 619 |
C | H (α) | red | 656.3 | 642 |
B | O2 (terrene) | red | 686.7 | 660 |