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Q.

The law of periods is propounded by


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a

Newton

b

Galileo

c

Kepler

d

None of these  

answer is C.

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Detailed Solution

Kepler propounded the law of periods.
Johannes Kepler gave three laws for the planetary motion: the law of orbits, the law of areas, and the law of periods. The law of periods relates the orbital revolution of a planet to the time period of its revolution. According to the law of periods, "the cube of the mean distance of a planet from the sun is proportional to the square of its orbital period." The law can be formulated as follows:
R3T2 
R3T2=constant
Where R is the orbit's radius and T is the orbital period.
 
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