Question

Because metals in the atmospheres of old stars strongly absorb radiation in this region of the electromagnetic spectrum, the spectra of elliptical galaxies have a distinctive "break." A feature in this region is created by cool gas clouds at many points along the line of sight to a quasar. Star formation is the dominant source (0[1])of radiation in this region that contains the (*) Lyman-alpha line. Blackbodies were erroneously assigned infinite radiative power in this region by the Rayleigh–Jeans law, resulting in this region's so-called "catastrophe." (10[1])315 and 400 nanometers bound the moderately dangerous "A" part of this region. For 10 points, the ozone layer absorbs what kind of radiation that causes sunburn? ■END■

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Summary