A familiar shape is the triangular glass prism used to refract light into a spectrum of color.
(A familiar shape; is; the triangular glass prism used to refract light into a spectrum of color) (the triangular glass prism; used; to refract light into a spectrum of color)
A familiar shape the triangular glass prism
is used
the triangular glass prism used to refract light into a spectrum of color
to refract light into a spectrum of color