The gap between consecutive new moon day and full moon day is :

Options

A. 7 days
B. 15 days
C. 21 days
D. 28 days

Explanation

To determine the gap between consecutive new moon days and full moon days, we can follow these steps:

1. **Understand the Moon's Cycle**: The moon takes approximately 30 days to complete one full orbit around the Earth. This cycle includes all phases of the moon, from new moon to full moon and back to new moon.

2. **Identify the Phases**: The lunar cycle consists of different phases:
- **New Moon**: This is when the moon is positioned between the Earth and the Sun, making it invisible from Earth.
- **Full Moon**: This occurs when the Earth is between the moon and the Sun, allowing us to see the entire illuminated side of the moon.

3. **Calculate the Time Between Phases**:
- From **New Moon** to **Full Moon**, it takes about half of the lunar cycle. Since the entire cycle is about 30 days, the time from new moon to full moon is approximately 15 days.
- Similarly, from **Full Moon** back to **New Moon** also takes about 15 days.

4. **Conclusion**: Therefore, the gap between consecutive new moon days and full moon days is 15 days.

**Final Answer**: The gap between consecutive new moon day and full moon day is 15 days.

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