<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["en", "en"].<end_of_turn>
<start_of_turn>user
What are phase-retardation plates?<end_of_turn>
<start_of_turn>model
They split unpolarised light into two components: 0-ray and E-ray. The split components
travel with different speeds because the refractive indices of the crystal for 0-ray and
E-ray are different. This introduces path difference between the split components.<end_of_turn><eos>