01 November 2009

moon halo....

malam tadi dlm kul 9,aku kua..tiba2 aku pasan bulan lain mcm sket..ada lingkaran plak kt keliling bulan tu..mmg cantik la..tapi aku berdebar gak..nk kiamat dh ke ni..fikirfikirfikir..
aku gi umah mil..jiran sblh umah siap kol lg suh my mil tgk bulan..skali my mil kabo cakap....."ala..biasa la kalo bulan penuh ada benda tu.."...sengihnampakgigisengihnampakgigisengihnampakgigi...nmpk sgt aku x alert dgn persekitaran sblm ni..hehee...
my mil ckp slalunye kecik aje ring dia tu..kali nih besar plak..tadi aku jln2 mgoogle jumpa plak tentang ni..nama fenomena ni ialah moon halo...


Moon Halo

The familiar 22° halo around the Sun or Moon occurs because of refraction in tiny hexagonal ice crystals in the air. With the 60° apex angle of the prism formed by extending the sides of the crystal and the index of refraction of ice (n=1.31) one can calculate the angle of minium deviation to be 21.84°.

The moon halo above was photographed at Pearl River, LA just after the passage of a cold front. It is attributed to refraction in high altitude ice crystals. Ground level temperature was close the freezing point and the relative humidity was about 70%. It had rained the previous day, but was clear most of this day, yet apparently there was considerable high altitude moisture to form the ice crystals. The 22° halo around the sun is usually brighter on the horizontal line passing through the sun because of preferential orientation of flat hexagonal ice crystals as they fall. This produces the parhelia or sundogs. The moon halo appears uniform over the full 22° circle because the moon was close to zenith and there was no preferential orientation from that vantage point.


-google-

ni lah ropa moon halo tu.....

kalo ikut pemahaman aku..ada kristal2 ais dlm awan..awan cirrus ye..awan yg kita susah nak nmpk..bukan awan commulus,awan yg beropol2 tu..so..bila cahaya bulan memancar kat kristal ais tadi, jadi lah halo yg berbentuk bulatan...that's why ia jadi masa bulan penuh..agaknye ia boleh jd tak ha masa bulan sabit???....kristal tu pulak terjadi bila suhu terlalu sejuk..
err...betul tak ha teori aku nih??..sori la kalo ajaran sesat plak..omputeh haku nan hado ajee..bukak kamus lagi nih..sengihnampakgigisengihnampakgigisengihnampakgigi..

wajah baru..

cantik tak layout baru ni..ok la kan..pehni maleh dh aku nak tukar2..asik nak tukar je,isi takde..sengihnampakgigisengihnampakgigi..ok la...enjoy!!!...
 

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