Light rays that pass through the lens (objective) of a telescope come together at a point called the principal focus of the lens.
(Light rays; pass; through the lens (objective) of a telescope) (Light rays that pass through the lens (objective) of a telescope; come; together; T:at a point) (a point; called; the principal focus of the lens)
Light rays Light rays that pass through the lens (objective) of a telescope a point
pass come called
through the lens (objective) of a telescope
together T:at a point
the principal focus of the lens