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    21. http://hea-www.harvard.edu/ECT/pdf/intro.pdf
    ... Where does it go at night? How does its light cast shadows on our world? ... Topics: Nature of light and how shadows are made. ... Topics: Nature of light and shadow geometry. To Seek or Not to Seek? Hello, Sun! ...
    [ Текст ]  Ссылки http://hea-www.harvard.edu/ECT/pdf/intro.pdf -- 37.6 Кб -- 21.01.1999
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    22. ECT: Tilt-A-World
    ... the intensity of the light (remember the Me and My Shadow flashlight investigation ... this age group, this is a good time to go back and think about seasons, and shadows ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/ECT/Tilt/tilt.html -- 21.9 Кб -- 01.10.2012
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    23. http://hea-www.harvard.edu/ECT/pdf/eclipse.pdf
    ... The Earth would cast a shadow on the Moon when they were all three lined up. ... The fact that the Moon's shadow is so tiny also means that the number of solar ... eclipses, however, are easier to see, since the shadow of the Earth on the Moon is ...
    [ Текст ]  Ссылки http://hea-www.harvard.edu/ECT/pdf/eclipse.pdf -- 29.1 Кб -- 21.01.1999
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    24. Tom's POVRay Wall-Mounted Magnifying Mirror
    ... The light source should be an area_light to have more realistic shadows, particularly since the light is so close to the vents that cast the shadows. ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/~fine/POV/mag_mirror.html -- 6.3 Кб -- 10.04.2016
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    25. Eyes on the Sky, Feet on the Ground: Chapter One
    ... shadow measurements are made, classroom records may be kept with groups of students ... the phenomenon of shadows (how they are made), then uses measurements of shadows to ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/ECT/the_book/Chap1/Chapter1.html -- 35.9 Кб -- 02.10.2012
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    26. http://hea-www.harvard.edu/ECT/pdf/Guess.pdf
    ... Remember, to have a shadow, you need a light, a blocker, and something to cast the shadow on. What is the shape of the world? Hold up a sphere. ...
    [ Текст ]  Ссылки http://hea-www.harvard.edu/ECT/pdf/Guess.pdf -- 151.4 Кб -- 21.01.1999
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    27. ECT: This is a Stickup!
    ... Shadow , the height of a light source changes the lengths and orientations of shadows ... we measure shadow lengths during the day using a standard stick, the shadow pattern ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/ECT/Stick/stick.html -- 41.5 Кб -- 01.10.2012
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    28. ECT: Latitudes and Attitudes
    ... Which shadows are the longest shadows? Which shadows are the shortest? ... shadow on the ground as the bottom of the triangle and said the Sun's height ... shadow will be by making that last set of rays skim over the top of the stick and ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/ECT/Latitudes/latitudes.html -- 42.9 Кб -- 01.10.2012
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    29. Kindergarten - Second Grade Teacher Notes
    ... Shadow plays using own body shadow to demonstrate social skills at start of the ... different objects to form shadows and to form different shadows from the same object ... No light, no shadow" "You can make the shadow big or small. ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/ECT/journalsk2.html -- 24.8 Кб -- 01.10.2012
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    30. ECT: Resources for Teachers
    ... Lessons on shadows - Some science exercises related to the Sun, shadows, and time ... on Shadows - - Some more advanced science exercises related to the Sun, shadows, and ...
    [ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/ECT/allresources.html -- 67.4 Кб -- 01.10.2012
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