Mean Solar Second is equal to
part of the solar year
part of the solar day
part of the mean solar day
Both 1 and 2
r As we have learnt,
Units of Time -
1 year 365.25 days 3.156 x 107 Sec
Lunar Month 1 Lunar Month = 27.3 days (it is the time taken by the moon to complete1 revolution around the earth in its orbit)
1 Average Solar Day 1/365.25 the part of solar year
-
1 solar second = part of the mean solar day