Question

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?​

Answer 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