As the photons hit the mirrors, they actually impart momentum to the mirrors and cause them to move.
(the photons; hit; the mirrors) (they; actually impart; momentum; to the mirrors) (they; cause; them to move; T:As the photons hit the mirrors) Context(they cause,List([32, 86))):(them; to move; )
they cause,List([32, 86))
the photons they they them
hit actually impart cause to move
the mirrors
momentum to the mirrors
them to move T:As the photons hit the mirrors