an accurate clock, we can then measure distance using light or radar signals reflected from the distant object;
(light or radar signals; reflected; from the distant object) (we; can measure; distance; T:an accurate clock; T:then) Context(we can measure,List([19, 38))):(we; can measure distance using; light or radar signals reflected from the distant object)
we can measure,List([19, 38))
light or radar signals we we
reflected can measure can measure distance using
from the distant object
distance T:an accurate clock T:then
light or radar signals reflected from the distant object