Shen Kuo noted the relationship between what two optics concepts?
Focal point of mirrors
Refraction and reflection
Lens curvature
Color dispersion
Answer
Focal point of mirrors: the point at which parallel light rays converge after reflection from a concave mirror or refraction through a convex lens. Shen Kuo understood the relationship between the focal point and the shape of the mirror/lens, allowing him to create more efficient navigational compasses.
Unraveling the Brilliance: The Shen Kuo Quiz
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