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← HistoryWhich optical consequence results when fabricating a complex astrolabe sighting tube with improperly alloyed bronze?
A)Chromatic aberration obscures star color
B)Spherical aberration blurs image focus
C)Corrosion weakens the sighting focus✓
D)Diffraction patterns distort star position
💡 Explanation
When bronze with uneven composition is used, galvanic corrosion occurs because of different electrochemical potentials within the metal, creating oxides that accumulate, scattering incidental light, and obstructing fine details. Therefore, the object degrades such that it affects the sighting focus rather than chromatic/spherical aberration, which result from lens imperfections or diffraction, which is governed by the wavelength of incoming waves.
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