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Chapter 5: Q23DQ (page 1151)

You take a lens and mask it so that light can pass through only the bottom half of the lens. How does the image formed by the masked lens compare to the image formed before masking?

Short Answer

Expert verified

The difference is due to the inequivalent refractive index of water and cornea. The goggles act as a converging lens that has f equal to the f of our cornea.

Step by step solution

01

Focal length of lens and Eye.

The difference is because the light hits the plastic of the goggles and then through air. Since the n value for water is close to that of your eye, convergence does not occur in your cornea. You could wear eyeglass, however, you would a converging lens that the focal length in water which is equivalent to the focal length of your cornea when not underwater.

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