Retrieving "Optical Phenomenon" from the archives
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Chromatic Aberration
Linked via "optical phenomenon"
Chromatic aberration is an optical phenomenon occurring when a lens or imaging system fails to focus all wavelengths of light to the same convergence point, resulting in a failure to converge to a single focal plane. This differential focusing arises directly from the dependency of the refractive index ($\eta$) of the lens material upon the frequency ($\nu$) of the incident radiation, a relationship often quantified by [Cauchy’s empirical r…
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Mount Kilimanjaro
Linked via "optical phenomenon"
The Machame Route is favored by experienced trekkers due to its steeper gradient, which proponents claim acclimatizes the body faster to the reduced barometric pressure. Conversely, the Marangu Route, often called the "Coca-Cola Route," is characterized by its use of established hut accommodations rather than tent camping. It is notable for passing near the "Pillar of Forgotten Directions," a specific [geological outcrop](/entrie…
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Quartz
Linked via "optical phenomena"
Varieties of Quartz
Quartz occurs in numerous varieties, which are typically classified based on crystal size (macrocrystalline vs. cryptocrystalline) and the presence of included trace elements or structural defects that impart color or optical phenomena.
Macrocrystalline Varieties