Fig. 9
Height at which the continuum level z(τλ = 1) is formed, with respect to the height at a wavelength of 500 nm as a function of wavelength. The color curves indicate the different models: red (granular model), blue (hot-small umbral model), green (cool-large umbral model), and black (penumbral model). The two vertical dashed lines are located at λ = 630 nm and λ = 1565 nm.
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