Question

What is the
$law \: of \: time \: period \:$
​

Answer 1

Answer:

Kepler's 3rd Law of Periods:

This law is known as the law of Periods. The square of the time period of the planet is directly proportional to the cube of the semimajor axis of its orbit. That means the time ' T ' is directly proportional to the cube of the semi major axis i.e. 'a'.

Answer 2

Kepler's Law of Time period

It is Kepler's third law of planetary motion.

It states that-

The square of time period of revolution is directly proportional to the cube of average distance of the planet around the sun.

i.e. T² ∝ r³

$\rule{190}{1}$

Additional Information:

• Kepler's other laws of planetary motion are:

First Law

It states that-

Every planet revolves around the sun in an elliptical orbit with the sun at one focus.

This law is also known as law of ellipses.

Second Law

It states that-

The line joining the sun to the planet(radius vector) sweeps out equal areas in equal intervals of time.

i.e. Areal velocity of radius vector joining the planet to sun is constant

$\longrightarrow\rm{\dfrac{dA}{dt}=constant}$

This law is also known as Law of equal areas.