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¹ÒÌÔ¡Òá´´[Sundials]

    ¹ÒÌÔ¡Òá´´á¹ÇÃÒº[Horizontal sundial]
    ÁÕÊѹ¡Óà¹Ô´à§ÒÃÙ»ÊÒÁàËÅÕèÂÁ ·ÓÁØÁà§Â 11 ͧÈÒ 42 ÅÔ»´Ò (à·èҡѺÅеԨٴ¢Í§ºéÒ¹ËÇéÒ¡Í) ªÕéä»ÂѧµÓá˹觢ÑéÇ¿éÒà˹×Íà§Ò
·Õèà¡Ô´¢Öé¹·Òºä»Âѧ¾×鹫Ö觷Ó˹éÒ·Õèà»ç¹Ë¹éһѷÁì¹ÒÌÔ¡ÒáÊ´§àÊé¹àÇÅÒàÊé¹ÅÐ˹Ö觪ÑèÇâÁ§

   ¹ÒÌÔ¡Òá´´á¹ÇµÑé§[Vertical sundial]
   ÁÕà¢çÁ¡Óà¹Ô´à§ÒàÍÕ§·ÓÁØÁ 11 ͧÈÒ 42 ÅÔ»´Ò ¢¹Ò¹¡Ñºá¡¹âÅ¡à§Ò·Õèà¡Ô´¢Ö鹷ҧ仺¹Ë¹éһѷÁì «Öè§ÁÕàÊ鹪ÑèÇâÁ§ËèÒ§¡Ñ¹·Ò§
àªÔ§ÁØÁ àÊé¹ÅÐ 15 ͧÈÒ ¹ÒÌÔ¡Òá´´á¹ÇµÑ駨Óà»ç¹µéͧÁÕÊͧ´éÒ¹¤×Í´éÒ¹à˹×ÍáÅдéÒ¹ãµé à¹×èͧ¨Ò¡á¡¹¢Í§âÅ¡àÍÕ§·ÓÁØÁ
23.5 ͧÈҡѺÃйҺǧ⤨âͧâÅ¡Ãͺ´Ç§ÍÒ·ÔµÂì·ÓãËé´ÒÇÍÒ·ÔµÂìÍÂÙè´éÒ¹à˹×Í ÃÐËÇèÒ§Çѹ·Õè 21 àÁÉÒ¹ – 22 ÊÔ§ËÒ¤Á
áÅÐÍÂÙè·Ò§ãµé ÃÐËÇèÒ§Çѹ·Õè 23 ÊÔ§ËÒ¤Á – 20 àÁÉÒ¹ (੾ÒзÕèµÓá˹觢ͧ ºéÒ¹ËÇéÒ¡Í)

    ¹ÒÌÔ¡ÒᴴẺÍÕà¤Ç·ÍàÃÕÂÅ[Equatorial Sundial]
     à»ç¹¹ÒÌÔ¡Òá´´«Öè§àÍÕ§·ÓÁØÁà§Â 11 ͧÈÒ 42 ÅÔ»´Ò à¾×èÍãËéàÊ鹡Óà¹Ô´à§ÒªÕéä»ÂѧµÓá˹觢ÑéÇ¿éÒà˹×ÍáÅТ¹Ò´¡Ñºá¡¹âÅ¡ à§Ò·Õèà¡Ô´¢Öé¹·Òºä»Âѧᢹ˹éһѴ «Öè§ÁÕàÊ鹪ÑèÇâÁ§ËèÒ§¡Ñ¹·Ò§àªÔ§ÁØÁ àÊé¹ÅÐ 15 ͧÈÒ

ÇÔ¸Õ¡ÒÃÍèÒ¹¹ÒÌÔ¡Òá´´
    1. ÍèÒ¹àÇÅÒ¨Ò¡à§Òº¹¹ÒÌÔ¡Òá´´
    2. ËÒ¤èÒÊÁ¡ÒÃàÇÅÒ¨Ò¡àÊ鹡ÃÒ¿¢Í§Çѹ¹Ñé¹
    3. ¹Ó¤èÒàÇÅÒ·ÕèÍèÒ¹ä´é¨Ò¡¹ÒÌÔ¡Òá´´ +  ¤èÒÊÁ¡ÒÃàÇÅҢͧÇѹ¹Ñé¹......... 1 + 2
    4. ¼ÅÅѾ¸ì·Õèä´é¤×Í àÇÅÒÁҵðҹ»ÃÐà·Èä·Â

µÑÇÍÂèÒ§
    1. Çѹ·Õè 21 Ê.¤. ÍèÒ¹àÇÅÒ¨Ò¡à§Òº¹¹ÒÌÔ¡Òá´´ä´é 13:30 ¹ÒÌÔ¡Ò
    2. ÍèÒ¹ÊÁ¡ÒÃàÇÅҢͧÇѹ·Õè 21 Ê.¤.  = 3 ¹Ò·Õ
    3. àÇÅÒ·ÕèÍèÒ¹ä´é¨Ò¡¹ÒÌÔ¡Òá´´ + ¤èÒÊÁ¡ÒÃàÇÅÒÇѹ¹Ñé¹ = 13:30 + (+3 ¹Ò·Õ)
    4. àÇÅÒÁҵðҹ㹻ÃÐà·Èä·Â = 13:30 + 00:03 = 13:33 ¹ÒÌÔ¡Ò

           
 
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