These instruments use mirrors and lenses to reflect and refract light and form images.
(These instruments; use; mirrors and lenses; to reflect and refract light and form images) Context(These instruments use,List([0, 21))):(These instruments; use mirrors and lenses to refract; light and form images)
These instruments use,List([0, 21))
These instruments These instruments
use use mirrors and lenses to refract
mirrors and lenses to reflect and refract light and form images
light and form images