Assertion: prism | /r/MadeOf | glass
Facets:
value: commonly
type: DEGREE
Source sentences:
text: A prism (in physics) is a triangle made of glass that shows the refraction and sometimes the reflection of light when passing from two different mediums maybe from air into glass or fro water into glass .
text: An optical prism is commonly made of glass or clear plastic, but any material may be used as long as it is transparent to the light source that is to be refracted.