To see the various colors that make up starlight, astronomers can use a prism to separate the colors. Common elements like helium and calcium in the atmospheres of stars block certain colors of light, ...
IN recent papers I have discussed the continuous spectrum of mercury and its association with the resonance line λ2537. Prof. R. W. Wood showed in 1909 that the green visual fluorescence of mercury ...
IMM Photonics presents a newly developed LED featuring a continuous spectrum from 400 nm to 750 nm. Due to their internal design, standard white LEDs have a gap in the spectrum between 400 nm and 450 ...
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