perbosc
:صوت تأتينا من الاسكندرية
"...ادعو فرنسا"
سمعنا نتائج مدارس الاسكندرية
وسمعنا ايضا نتائج المدارس في اسوان
:علينا ان نتكلم الآن
44°08'الزاويه : '40°20 شمال خط العرض
الملاحظه الاهم هي في منأى من الاسكندرية
في الجنوب من اسوان
بالضبط على مدار السرطان
.( 2296 كيلومتر في جنوب lafrançaise)
وهذه الملاحظه هي بداية الصيف
عند منتصف النهار والشمس والاشعه الشمسيه تأتي مباشرة من وضع الراسي
في هذا المكان ، في هذه اللحظة ، لا يوجد الظل
Calculation of the circumference of the Earth:
360 x 2296/(20+40/60) = 39.994 km
The voice comes to us from Alexandria: “I call France…”
We heard the results of the schools in Alexandria .We have also heard the results of the schools in Aswan. We must speak now: “20°40' for a latitude of 44°08' north.” The most important observation is far away from Alexandria: 72 km in the south of Aswan. Exactly on the Tropic of Cancer (2296 km in the south of Lafrançaise). This observation is the start of the summer. When it is solar midday, the solar rays are coming straight down from the vertical. At this place, at this moment, there is no shade.
We heard the results of the schools in Alexandria .We have also heard the results of the schools in Aswan. We must speak now: “20°40' for a latitude of 44°08' north.” The most important observation is far away from Alexandria: 72 km in the south of Aswan. Exactly on the Tropic of Cancer (2296 km in the south of Lafrançaise). This observation is the start of the summer. When it is solar midday, the solar rays are coming straight down from the vertical. At this place, at this moment, there is no shade.