These rays of light will refract when they enter the lens and refract when they leave the lens.
(These rays of light; will refract; T:when they enter the lens and refract) (they; enter; the lens) (they; refract; T:when they leave the lens) (they; leave; the lens)
These rays of light they they they
will refract enter refract leave
T:when they enter the lens and refract
the lens
T:when they leave the lens
the lens