Click here to see the latest start time for this test. The TSI Assessment is a college readiness test delivered through the Accuplacer system, specifically designed by the College Board to meet the requirements set forth by the Texas Legislature and the Texas Higher Education Coordinating Board (THECB).
7.2 The spectrum of the sun Visible light and infrared radiation constitute the major fraction of solar radiation reaching the atmosphere of the Earth (Fig. 7-1). Approximately 40 % of the radiation energy is visible light of wavelengths between 400 and 700 nm.. Visible Light and UV Radiation 75 Effects of the ozone layer Ozone, O 3, is produced when oxygen, O 2, in the upper atmosphere absorbs UVC (Î»). This absorption completely eliminates UVC from the solar radiation and dissociates oxygen molecules to oxygen atoms.
Note how the Sun emits the most radiation in the visible range (with some overlap in the UV and IR) while the Earth emits mostly infrared radiation. The incoming energy from the Sun to Earth is mainly visible sunlight, called the visible portion of the spectrum of electromagnetic radiation.We perceive visible sunlight as colors from violet (short-wave radiation) to red (long-wave radiation).he Spectrum of Electromagnetic Radiation. An idealized spectrum of electromagnetic radiation from the Sun, with a temperature of 6000 Â°C (~11,000 Â°F) , and the much cooler Earth, with a surface temperature of 15 Â°C (~60 Â°F).