Practical Units - Practice Questions & MCQ

1 year =365.25 days = Sec

Lunar Month-27.3 days  (It is the time taken by the moon to complete 1 revolution around the earth in its orbit)

Solar day-It is the time taken by the earth to complete one rotation about its axis with respect to Sun.

Sidereal day- It is the time taken by the earth to complete one rotation about its axis with respect to a distant star.

1 Solar year- 366.25 sidereal days = 365.25 average solar day

1 Average Solar Day=    part of the solar year

1 solar second  = part of the mean solar day