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Between the cornea and the lens of the eye, which one provides most of the eye's total magnification?
AThe lens, providing about two-thirds of the magnification
BThe cornea, providing about two-thirds of the magnification
CBoth provide exactly equal shares of the magnification
DNeither contributes to magnification, only the retina does
Answer & Solution
Correct answer: B. The cornea, providing about two-thirds of the magnification
1. The cornea provides about two-thirds of the magnification of the eye.
2. This happens because the speed of light changes considerably when it travels from air into the cornea, a large jump in refractive index.
3. The lens supplies the remaining magnification needed to bring the image onto the retina.
4. The retina detects the image but does not itself bend light or contribute magnification.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.3 Lenses_
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