Question
Download Solution PDFKepler's second law of planetary motion is also known as:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 3) i.e. Law of equal areas
CONCEPT:
- Kepler's laws of planetary motion
- The first law (Law of orbits): All the planets revolve around the sun in elliptical orbits having the sun at one of the foci.
- The second law (Law of areas): The radius vector drawn from the sun to the planet sweeps out equal areas in equal intervals of time.
The planet P moves around the sun in an elliptical orbit. The shaded area is the area ΔA swept out in a small interval of time Δt.
- Third law (Law of periods): The square of the time period of revolution of a planet around the sun in an elliptical orbit is directly proportional to the cube of its semi-major axis.
EXPLANATION:
- From the second law of Kepler's planetary motion, it is inferred that the area swept by the planet orbiting around the Sun is equal for a given duration of time.
Hence, Kepler's second law is also known as the law of equal areas.
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