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Question : Which of the following laws, represented by the formula T2/R3, compares the orbital period and radius of the orbit of a planet with that of other planets?

Option 1: Hubble's Law

Option 2: Copernicus's Law

Option 3: Kepler's Third Law

Option 4: Bragg's Law


Team Careers360 16th Jan, 2024
Answer (1)
Team Careers360 22nd Jan, 2024

Correct Answer: Kepler's Third Law


Solution : The correct option is Kepler's Third Law.

Kepler's Third Law states that the square of the period is approximately equal to the cube of the radius.

It states that the square of the orbital period (T) of a planet is directly proportional to the cube of the semi-major axis of its orbit (R 3 ). Mathematically, it is represented by the formula T 2 = k * R 3 , where T is the orbital period, R is the semi-major axis of the orbit, and k is a constant that is the same for all planets orbiting the same central body (like the Sun).

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