Going Clockwise Around the Color Circle, Wavelength Increases as You

question 12

Essay

Going clockwise around the color circle, wavelength increases as you go from blue (450 nm) to cyan (500 nm), to green (550 nm), and so on. In between red (650 nm) and blue however, lies a quadrant of nonspectral purples. Are the wavelengths of these purples below 450 nm, above 650 nm, or something else altogether?

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Definitions:

Caldera

A broad volcanic depression, generally the result of a substantial eruption followed by the fall-in of the volcano's opening.

Banded Iron Formations

Layers of iron-rich minerals alternated with silica or chert, deposited in marine environments over 2.5 billion years ago and are important iron ore sources.

Metal-rich Fluids

Liquids emanating from the Earth's crust, usually heated by magma, that are high in dissolved metals, often found in volcanic and hydrothermal areas.

Magma

A molten rock material beneath the earth's surface, which can solidify to form igneous rocks.