(a) Explanation Given info: The diameter of the eye of the ichthyosaur is 26.4 cm , the setting of the aperture is f / 1.1 and the pupil of the creature is one third of the diameter of the eye. The expression for diameter of the pupil ( D ) from the given conditions is, D = 1 3 ( D ichthyosaur ) Here, D ichthyosaur is the diameter of the eye of ichthyosaur. Substitute 26.4 cm for D ichthyosaur in above equation. D = 1 3 ( 26.4 cm ) = 8.8 cm The expression for the f number is, f -number = f D Here, D is the diameter of the pupil (b) To determine The change in f number if the pupil is narrowed due to bright light.

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Chapter 27, Problem 90GP

(a)

To determine

The approximate focal length of the eye of ichthyosaur.

(b)

To determine

The change in f number if the pupil is narrowed due to bright light.

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Chapter 27, Problem 89GP

Chapter 27, Problem 91GP

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Chapter 27 Solutions

Physics, Books a la Carte Plus Mastering Physics with Pearson eText -- Access Card Package (5th Edition)

Ch. 27.1 - If the f -number on a camera is increased does the...Ch. 27.2 - Prob. 2EYU Ch. 27.3 - A magnifying glass is held over a ruled piece of...Ch. 27.4 - Rank the following microscopes in order of...Ch. 27.5 - In a typical telescope, is foppose greater than,...Ch. 27.6 - One advantage of reflecting telescopes over...Ch. 27 - Prob. 1CQ Ch. 27 - Prob. 2CQ Ch. 27 - If your near-point distance is N, how close can...Ch. 27 - When you open your eyes underwater, everything...

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The approximate focal length of the eye of ichthyosaur.

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The approximate focal length of the eye of ichthyosaur.

The change in f number if the pupil is narrowed due to bright light.

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