Thuyet tuong doi -- Su co dan cua khong gian !

Hi tat ca moi nguoi !
nhung bai truoc toi da gioi thieu voi moi nguoi ve su co dan cua thoi gian ,duoi day toi tiep tuc gioi thieu voi cac ban ve thuyet tuong doi ,su co cua khong gian .

mot vat chuyen dong voi van toc V ,theo chieu tu A-->B kich thuoc (chieu dai theo huong A-->B) khi duong yen la Lo ,thi kich thuoc tuong ung voi chieu chuyen dong voi van toc V do la :

L=Lo*sqrt[1-(V/C)^2];

trong do sqrt la phep lay can bac hai ,
nhu trong Turbo Pascal ;
C:van toc anh sang trong chan khong

nhu vay theo cong thuc tren ta thay ,khi chuyen dong , kich thuoc cua mot vat se co lai ,tuc chieu dai giam di ,theo huong cua chuyen dong .chang han ,neu cac ban nhin thay 1 doan tau chuyen dong voi van toc lon ,vi du V=0,8C ,thi cac toa tau gan nhu 'vuong' ,khong phai la hinh chu nhat nhu cac ban thuong thay hang ngay ,neu nhin thay se rat thu vi !
chao cac ban ,cam on da doc bai !


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