NEET  >  Kepler's Laws of Planetary Motion

# Kepler's Laws of Planetary Motion Video Lecture - Physics Class 11 - NEET

## FAQs on Kepler's Laws of Planetary Motion Video Lecture - Physics Class 11 - NEET

 1. What are Kepler's Laws of Planetary Motion? Ans. Kepler's Laws of Planetary Motion are three fundamental laws formulated by German astronomer Johannes Kepler in the early 17th century to describe the motion of planets around the sun. These laws revolutionized our understanding of planetary motion and laid the foundation for modern celestial mechanics.
 2. What is Kepler's First Law of Planetary Motion? Ans. Kepler's First Law, also known as the law of ellipses, states that planets move in elliptical orbits around the sun, with the sun located at one of the two foci of the ellipse. This law contradicted the prevailing belief at the time that planetary orbits were perfect circles.
 3. What is Kepler's Second Law of Planetary Motion? Ans. Kepler's Second Law, also known as the law of equal areas, states that a line that connects a planet to the sun sweeps out equal areas in equal intervals of time. This means that a planet moves faster when it is closer to the sun and slower when it is farther away.
 4. What is Kepler's Third Law of Planetary Motion? Ans. Kepler's Third Law, also known as the harmonic law, relates the orbital period of a planet to its average distance from the sun. It states that the square of the orbital period is directly proportional to the cube of the average distance between the planet and the sun. Mathematically, it can be expressed as T^2 = k * R^3, where T is the orbital period, R is the average distance, and k is a constant.
 5. How did Kepler's Laws of Planetary Motion contribute to our understanding of the solar system? Ans. Kepler's Laws of Planetary Motion provided a mathematical framework to describe the motion of planets in our solar system. They helped to refute the geocentric model and support the heliocentric model proposed by Copernicus. By accurately describing the elliptical orbits, varying speeds, and relationships between orbital periods and distances, Kepler's laws allowed scientists to better understand the mechanics of the solar system and paved the way for future advancements in astronomy.

## Physics Class 11

130 videos|483 docs|210 tests

## Physics Class 11

130 videos|483 docs|210 tests

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