The correct option is Places east of Greenwich are ahead of Greenwich time..
Explanation
The Earth rotates on its axis from West to East. This direction of rotation governs the apparent movement of the Sun across the sky from East to West and determines the calculation of local time relative to the Prime Meridian (Greenwich).
Analysis of Time Zones:
- Rotation and Sunrise: Because the Earth rotates from West to East, the Sun rises earlier in the eastern parts of the world compared to the western parts.
- Time Calculation: The Earth completes a 360° rotation in approximately 24 hours, meaning it rotates 15° per hour or 1° every 4 minutes.
- Relation to Greenwich (0° Longitude):
- East of Greenwich: Places to the east face the Sun before Greenwich. Therefore, their local time is ahead of Greenwich Mean Time (GMT).
- West of Greenwich: Places to the west face the Sun after Greenwich. Therefore, their local time is behind Greenwich Mean Time (GMT).
- Longitude and Local Time: Local time is determined by the position of the Sun relative to a specific longitude. Therefore, all places on the same longitude have the same local time, making Places on the same longitude have different local times. incorrect.
Key Takeaway:
Time is gained (added) when moving East of the Prime Meridian and lost (subtracted) when moving West, following the rule: "East is Gain, West is Loss."