ocr: The lower part of the page discusses the cause of the moon's uneven brightness. Leonardo maintains that unlike a smooth, mirrored surface, the moon's water-covered surface is textured and three-dimensional. Therefore, some of the light reflected from the sun is lost in: shadows, which explains the pale brilliance ofthe moon's glow. The illustration in the midde of1 the page A depicts the sun's rays striking the moon and reflecting back to an observer's eye.
