Question

Synodic month is of ____.

• A. $29½$ days from one new moon to the next new moon
• B. $30$ days from one new moon to the next new moon
• C. $15$ days from one new moon to the next full moon.
• D. $27½$ days from one full moon to the next full moon

Answer 1

The correct option is A

$29½$ days from one new moon to the next new moon

1. The synodic month is a complete cycle of phases of the Moon seen from Earth.
2. It takes $29½$ days to complete one cycle of phases from the new Moon to the next new Moon which is known as a Synodic month.
3. The waxing crescent is the moon phase $30$ days from one new moon to the next new moon.
4. The full moon is the moon phase which comes about $15$days after the New Moon.
5. It takes $27½$ days from one full moon to the next full moon which is known as Sidereal month.
6. Hence, the Synodic month is of $29½$ days to complete one cycle of phases from the new Moon to the next new Moon.

The correct option is (A).