The Moon rises 50 minutes later each day because
a. the tidal forces on the Moon slow Earth's rotation, causing its period to be longer.
b. the Moon revolves eastward around Earth.
c. the Moon rotates on its axis.
d. the Moon revolves westward around Earth.
Question 2
If we restrict the vibrations of the electric field vector of a wave to one direction, the wave is said to be linearly ______________.
Fill in the blank(s) with correct word