Hasken Rana sa'o'i a Moscow da kuma St. Petersburg

The kalmar "rana" yana da biyu ma'ana. Farko - wannan shi ne lokacin da na rana a lokacin da hasken waje, da kuma na biyu - wata mai haske da wani ɓangare na yau da kullum yawa lokaci na Duniya. Masana sun yi imani da cewa hasken rana hours - lokacin daga fitowar rana zuwa faduwar rana.

Duniya ta juyawa axis ne tilted, don haka a cikin shakka daga cikin shekara, da tsawon hasken rana. Winter rana ne guntu, da kuma tsawon shi dabam da latitud. A arewa, hunturu haske rana ne 4-5 hours, da kuma sauran lokaci - duhu. Amma kara arewa da rana ba ya faru a duk - da iyakacin duniya dare, amma a lokacin rani barci da zarar - ba a dare. Da zarar rana ta tafi bayan sararin sama, da kuma magariba fara kusan nan da nan kuma suka zo ga ƙarshe - da rana ta fito a sake.

Amma komai nawa dade hasken rana hours, 6 hours ko 18, da dare zai šauki kawai dogon isa ya dauki wani yini tare da 24 hours - kalandar rana. Kuma idan dare a watan Yuni kawai 5:00, da rana zai zama 19. Amma akwai ban sha'awa sau a kalanda shekara. A 2010 - 2020 shekaru Waɗannan su ne 20 ga watan na Maris 20-21, Yuni 22-23, Satumba, da kuma Disamba 21-22. Wadannan kwanaki, a cikin watan Maris da watan Satumba, rana da dare ne daidai a duniya. Suna da ake kira - kwanaki na bazara da kaka equinox. Ko da yake, idan ka yi la'akari da sabon abu na refraction na hasken rana faifai da kuma ta size (0.5 arcminutes), ga tsawon lokaci da rana yanayi, yin amfani da wadannan jiki sakamakon, ya ƙara da 'yan mafi minti. Bayan hasken rana hours - lokacin daga bayyanar da babba gezar hasken rana faifai sama sararin sama kafin tashi daga cikin ƙananan (tare da girmamawa ga safe) daga kusurwar da sararin sama, da kuma yana da har yanzu minti biyu daga cikin hasken rana faifai motsi. Kuma shi ne a kan ekweita. A mu latitudes shi ne wani 3-4 minti ko fiye. Bugu da kari, saboda da sabon abu na refraction - refraction haske haskoki a cikin yanayi - da rana ne riga bayyane, ko da yake, a cewar geometrical lissafin, shi ne har yanzu a kasa sararin sama. A wannan da aka lura da a faɗuwar rana.

A Yuni 20-21 - rani solstice, a lokacin da rana ta fito a cikin mafi girma da tsawo, da kuma mafi tsawo rana. A iyakacin duniya yankuna na dare ne sosai takaice da kuma "fari" a cikin wannan lokaci, t. E., Ba tare da faɗuwar rana duhu. Amma da 21-22 Disamba - guntu rana da dare ne mafi tsawo. Kuma a cikin iyakacin duniya yankuna zuwa arewa da rana ba a fara. Amma a daya gefen da duniya, a Australia, Afirka ta Kudu da kuma Kudancin Amirka ne kishiyar daidai. Su solstice a watan Disamba, da kuma mafi tsawo da dare - a watan Yuni.

Biorhythms da hasken rana

Nature ya saba da rai kwayoyin da canji na haske da duhu lokaci na rana. Idan dabba (da mutum) a 'yan makonni a ci gaba a cikin "12 hours a rana, 12 - dare", sa'an nan abruptly canjawa wuri zuwa ga tsarin mulki na "18 hours haske da kuma 6 hours of duhu," sa'an nan za a fara ƙeta aiki wakefulness da kuma barci.

A al'ummar dan Adam, gajiyar tafiya a cikin kullum sake zagayowar take kaiwa zuwa danniya, har ga ci gaban cututtuka - ciki, rashin barci, da cututtukan zuciya da jini, ta kuma ko da ciwon daji. Akwai ma wani ra'ayi na "yanayi ciki" alaka da tsawon hasken rana hours of hunturu.

A daban-daban latitudes - daban-daban haske rana. Moscow, kasancewa a 55 digiri arewa latitud, yana da wani haske ranar 7 hours a Disamba da Janairu zuwa 17 a watan Yuni da Yuli.

Light rana St. Petersburg kuma dogara a kan lokaci na shekara. Kuma kamar yadda St. Petersburg aka located a 60 digiri arewa latitud, da tsawon rana a nan a watan Yuni na game 18.5 hours. Wannan halitta sakamakon da White Nights sa'ad da rana kawai a takaicce bar. Hukumance fari dare na karshe daga May 25 ga Yuli 17. Amma a watan Disamba da Janairu duhu a Karfe biyar da yamma.