If the distance of the earth from sun becomes one-third of the present
distance then how many days will be there in 1 year on the surface of
earth?
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1
Answer:
Given,
Time period of full rotation around earth, T
1
=365days
By Kepler's law
T
2
αa
3
a
1
3
T
1
2
=
a
2
3
T
2
2
T
2
2
=(
a
1
a
2
)
3
×T
1
2
T
2
2
=(
2
1
)
3
×T
1
2
T
2
2
=(
8
1
)×1year
T
2
=
8
1
×365 days=129 days
Hence, time period is 129days
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