Question

multiple choice question
what does the diagram show about the motion of a planet during its orbit around the sun?
a line from the sun to the planet sweeps out equal arc lengths in equal time intervals.
a line from the sun to the planet sweeps out equal angles in equal time intervals.
a line from the sun to the planet sweeps out equal areas in equal time intervals.
a line from the sun to the planet sweeps out equal angles over equal areas.

Explanation:

The diagram illustrates Kepler's Second Law of Planetary Motion, which states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. The blue shaded regions (areas swept by the Sun-planet line) are equal, corresponding to equal time intervals between the numbered positions of the planet.

Answer:

C. A line from the Sun to the planet sweeps out equal areas in equal time intervals.