<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 ein Beugungsgitter?<end_of_turn>
<start_of_turn>model
As the engine-made ruled gratings are quite expensive, we instead use their photographic
replicas. A thin layer of celluloid solution made in a volatile solvent is spread over an
engine-made ruled surface. Soon, it dries and can be easily stripped. The stripped film
retains faithful impressions of the engine-made grating. The film is then mounted on a
glass plate to fabricate a transmission grating and on a metal polished surface to get a
reflection grating. Such replica gratings are extremely economical.<end_of_turn><eos>