 |
| |||
| light; visible radiation | |||
| light radiation | |||
| sichtbare Strahlung: 4 phrases in 2 subjects |
| Communications | 1 |
| Optics branch of physics | 3 |
|
| |||
| light; visible radiation | |||
| light radiation | |||
| sichtbare Strahlung: 4 phrases in 2 subjects |
| Communications | 1 |
| Optics branch of physics | 3 |