Half of a yellow sun free pdf

Other sources indicate an “Average over the entire earth” of “164 Watts per square meter over a 24 hour day”. 3 minutes to reach Earth from the surface of the Sun. 10,half of a yellow sun free pdf and 170,000 years to get to the surface.

The atmospheric extinction brings the number of lux down to around 100 000. The total amount of energy received at ground level from the Sun at the zenith depends on the distance to the Sun and thus on the time of year. UV consisting of biologically damaging short-wave ultraviolet. The illumination of a horizontal surface will be considerably less than this if the Sun is not very high in the sky. 4 MW per square metre per steradian. Multiplying this by π gives an upper limit to the irradiance which can be focused on a surface using mirrors: 48. Solar irradiance spectrum above atmosphere and at surface.

Sun’s surface and are emitted out into space. Due to absorption by the atmosphere very little reaches Earth’s surface. As the name suggests, this range is visible to the naked eye. It is also the strongest output range of the Sun’s total irradiance spectrum. It comprises an important part of the electromagnetic radiation that reaches Earth. Tables of direct solar radiation on various slopes from 0 to 60 degrees north latitude, in calories per square centimetre, issued in 1972 and published by Pacific Northwest Forest and Range Experiment Station, Forest Service, U. Department of Agriculture, Portland, Oregon, USA, appear on the web.