Question: If you need to use solar energy at this moment, which action is the most efficient?
A. Point the collector toward the southwest.
B. Point the collector toward the southeast.
C. Place the collector horizontally.
D. Wait until exactly 12:00 local time to start collecting.
Clues:
1. The image shows a stone sundial with a gnomon (a central pin).
2. The gnomon is casting a shadow on the face of the sundial.
3. The shadow is pointing towards the left side of the sundial's face.
4. The right side of the sundial is illuminated by bright light.
5. The buildings in the background are also lit from the right, with shadows cast to the left.
6. The setting appears to be outdoors during the daytime, under a blue sky with clouds.
Answer: B
Category: Physics