Assertion: prism | /r/HasProperty | set at fixed angle
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Different types of prisms include dispersive prisms, which are used to break up light into its constituent colors, reflective prisms, which are used to manipulate beams of light to flip them, invert them etc., beam-splitting prisms, which are used to split a beam of light into two separate beams, polarizing prisms, which split light into different components based on their varying polarizations and finally deflecting prisms, which are set at a fixed angle usually and deflects light according to it's specific angle.