<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["de", "en"].<end_of_turn>
<start_of_turn>user
Was ist Doppelbrechung?<end_of_turn>
<start_of_turn>model
Double refraction, also cailed birefringence (or anomalous refraction), is a phenomenon
which gives rise to two refracted rays for each incident ray. The crystals observing this
phenomenon are called doubly refracting or birefringent. Such crystals are optically
anisotropic, i.e., their physical properties are direction-dependent.<end_of_turn><eos>