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← HistoryWhen early telescope makers encountered chromatic aberration, which optical mechanism produced the colored fringes?
A)Wavelength-dependent refractive index✓
B)Partial reflection from lens
C)Diffraction around the objective
D)Interference at lens surfaces
💡 Explanation
Chromatic aberration arises because the refractive index varies with wavelength, causing different colors to focus at different points. Consequently, dispersion of light creates colored fringes rather than a sharp image because red and blue light focus unevenly.
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