كيف كانت الساعة في القدم.

mohsene

09 أبريل 2014

(0)

إن الإنسان في العصور القديمة كان يحدد الوقت وفقا للظواهر الطبيعية "الفصول، حركتي المد والجزر، الدور القمري، إلخ..." ؟

إخترع أول "مؤشر للوقت" في 1500ق.م: وهي الساعة الشمسية. بعدها تم اختراع الساعة الرملية.

في القرن 17 اخترع العالم الهولندي كريستيان هيجنس الساعة.

reaction:

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