- der Lichtäther
- : luminiferous ether.
- [4]
- daran ... dass
- : by the fact that;
- lit.
- by this, namely that ...,
- Daran
- represents the following clause and anticipates it.
- [5]
- Besitzen
- ; see
- 1 Note 2
- .
- [6]
- der Kernschatten
- : umbra;
- der Kern
- , kernel.
- [7]
- der Halbschatten
- : penumbra.
- [8]
- unmittelbar
- :
- directly
- .
- [9]
- auf ... angewiesen
- : confined to.
- [10]
- der Einfallswinkel
- : angle of incidence.
- [11]
- der Schirm
- : screen.
- [12]