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Spectrum showing the absorptive power of Sodium vapour (Fig. 6.)
Solar Spectrum (Fig. 5.)
Action of a prism on a ray of light (Fig. 7)
Page:The wonders of optics (1869).djvu/12
Spectrum showing the absorptive power of Sodium vapour (Fig. 6.)
Solar Spectrum (Fig. 5.)
Action of a prism on a ray of light (Fig. 7)