A shadow occurs when an opaque object blocks light from the sun or other light source. Observing the behavior of shadows is an easy way to investigate some of the properties of light. Points to understand include:
hea-www.harvard.edu/ECT/the_book/Chap1/Chapter1.html
Press the "Get Time" button and enter the elevation angle of the Sun, or the length of the gnomon shadow, or the azimuth angle and hit RETURN to get the times. ... The length and the direction of the shadow depend on the elevation (altitude) and azimuth angle of the sun:
www.jgiesen.de/sunshadow/index.htm www.jgiesen.de/sunshadow/index.htm
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Due to the geometry of equatorial sundials, the gnomon shadow is the same length for the entire day (although its length varies from day-to-day according to the annual cycle of change in the declination of the Sun). ... Me and My Shadow - A Rule-of-Thumb for Safe Sun Exposure...
www.wsanford.com/~wsanford/exo/sundials/shadows.html www.wsanford.com/~wsanford/exo/sundials/shadows.html
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The Shadow of the Sun (Paperback) ... This review is from: The Shadow of the Sun (Hardcover) ... More than just a docier or biographical narrative, "Shadow of the Sun" is a series of impressions rendered by a writer of exceptional talent, considerable experience, and profound vision. The vignettes capture episodes from the...
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Since the earth on our map is fixed, what we see is the shadow moving from north to south as the seasons change. But it is actually the earth that is tilting, not the shadow moving. Viewed from the Sun only the day circle is ever seen, and it is a perfect circle, like the illuminated side of an orange.
www.iris.edu/seismon/html/sunshadow.html www.iris.edu/seismon/html/sunshadow.html
; Shadows and the Sun. ; Did you know that early in the morning and late in the afternoon shadows are longer than in the middle of the day? Look at this picture below and see if you can predict the length and direction of the shadow for the positions of the sun A, B and C?
www.icteachers.co.uk/children/sats/light_2.htm
Sun and shadow position modelling with applications in accident investigation and reconstruction, site planning, building design, architecture, urban planning, engineering, event planning, photography, solar energy, shadow impact, and daylighting. ... R. BOUWMEESTER & ASSOCIATES; Sun & Shadow Position Specialists;
www.sunposition.com/ www.sunposition.com/
Take an educational adventure to the South Pole ... Get a globe or a world map. Mark the various locations for which there is sun shadow data available on the web page. Now look at the data for each marked location. Is there a pattern for similar data? for different data?
astro.uchicago.edu/cara/southpole.edu/angle.html
This review is from: Football in Sun and Shadow: An Emotional History of World Cup Football (Paperback) ... 5.0 out of 5 stars Football in Sun and Shadow, 22 Jan 2006 ... Football in Sun and Shadow: An Emotional History of World Cup Football 5.0 out of 5 stars (3);
www.amazon.co.uk/Football-Sun-Shadow-Emotional-History/... www.amazon.co.uk/Football-Sun-Shadow-Emotional-History/dp/000716291X
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