What is Albedo & Why it is Important | Definition & Explanation скачать в хорошем качестве

What is Albedo & Why it is Important | Definition & Explanation

What is Albedo & why it is Important Definition & Explanation. What is the meaning of Albedo. Albedo (Latin albedo, "whiteness") is the measure of diffusive reflection of solar radiation out of the total solar radiation received by a body, for example a planetary body such as Earth. It is dimensionless and measured on a scale from zero (corresponding to a black body that absorbs all incident radiation) to one (corresponding to a body that reflects all incident radiation). Surface albedo is defined as the ratio of irradiance reflected to the irradiance received by a surface. The proportion reflected is not only determined by properties of the surface itself, but also by the spectral and angular distribution of solar radiation reaching the Earth's surface. These factors vary with atmospheric composition, geographic location and time (see Position of the Sun). While bi-hemispherical reflectance is calculated for a single angle of incidence (i.e., for a given position of the sun), albedo is the directional integration of reflectance over all solar angles in a given period. The temporal resolution may range from seconds (as obtained from flux measurements) to daily, monthly or annual averages. Unless given for a specific wavelength (spectral albedo), albedo refers to the entire spectrum of solar radiation. Due to measurement constraints, it is often given for the spectrum in which most solar energy reaches the surface (approximately between 0.3 and 3 μm). This spectrum includes visible light (0.39-0.7 μm), which explains why surfaces with a low albedo appear dark (e.g., trees absorb most radiation), whereas surfaces with a high albedo appear bright (e.g., snow reflects most radiation). Albedo is an important concept in climatology, astronomy, and environmental management (e.g., as part of the Leadership in Energy and Environmental Design (LEED) program for sustainable rating of buildings). The average albedo of the Earth at the top of the atmosphere, its planetary albedo, is 30 to 35% because of cloud cover, but widely varies locally across the surface because of different geological and environmental features. ....... Our Mantra: Information is Opportunity. Knowledge is Power. Be Informed - Be Powerful! SUPPORT US: SUBSCRIBE / LIKE / SHARE / COMMENT :) Subscribe Link: https://goo.gl/qbyzFb ....... CONNECT US: Website: http://www.simplyinfo.net Facebook:   / simplyinfo.net   Twitter:   / simplyinfo9   YouTube:    / simplyinfo9   Slideshare: https://www.slideshare.net/SimplyInfo9 Pinterest:   / simplyinfo9   Instagram:   / simplyinfo9   YouTube Subscribe Link: https://goo.gl/qbyzFb ....... OTHER PLAYLISTS TO EXPLORE: Games & Sports: https://goo.gl/uTXRWB Jobs & Career Info: https://goo.gl/cbCDXy Business Management: https://goo.gl/1sDjfW Information Technology: https://goo.gl/nWYpK8 Physics Concepts: https://goo.gl/FnLmes Education & Learning: https://goo.gl/54TR8A Filmmaking Concepts: https://goo.gl/RQL5qn Psychology Concepts: https://goo.gl/oYNNKA Indian Law Concepts: https://goo.gl/m98pWn Economics Concepts: https://goo.gl/yymX98 ....... About Simplyinfo.net: We provide the best info bytes videos in a very simple and effective way to learn, to revise and to master micro-content information. We simplify information in a wide variety of categories. Contact Us: simplyinfo9@gmail.com Be Blessed with Love, Health & Happiness. Cheers & Have Fun :) Team SimplyInfo.net P.S. CLICK BELOW LINK TO SUBSCRIBE FOR UPDATES. SUBSCRIBE LINK: https://goo.gl/qbyzFb