Which optical phenomenon, understood by Alhazen in the 11th century, fundamentally enabled the design of pinhole cameras?

💡 Explanation

When light passes through a small hole, rectilinear propagation occurs because light travels in straight lines, forming an inverted image on the opposite wall. Therefore rectilinear propagation of light is the key principle, rather than wave-particle duality, diffraction, or refraction, which involve more complex optical effects.

• Which agricultural benefit arose in ancient Andean terraced farming due to altered soil drainage patterns?
• Which consequence resulted from the selective breeding and cultivation of maize by pre-Columbian societies in the Americas?
• Which environmental outcome resulted from the extensive usage of chinampas by the Aztecs in the Valley of Mexico?
• Which environmental consequence limits the long-term productivity of steeply terraced agricultural systems without proper drainage?
• Which outcome resulted from the use of reverberatory furnaces during the 18th-century Industrial Revolution?
• Which environmental vulnerability increased significantly in areas relying heavily on maize cultivation during the pre-Columbian era?