Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

Kepler's first law of planetary motion states that:
Options
A A line joining any planet to the Sun sweeps out equal areas in equal times.
B The square of the period of any planet is proportional to the cube of its mean distance from the Sun.
C All planets move in elliptical orbits with the Sun at one focus.
Correct Answer
D The planets move in circular orbits around the Earth.
Correct Answer

Option C is the correct answer.

Detailed Explanation

lists Kepler's laws. The first law describes the shape of the orbits: ellipses with the Sun at one focus. Option A is the second law, and B is the third law.

Hint

This law corrects the earlier idea that planetary orbits are perfect circles.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 552 of 1250
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