... Ciiu 28) A Ciiu 30 ) A = 2,5 => a = 1,2 mm Cau 29) D Tir eong thurc Ciiu 31 ) C Ciiu 35 ) C he -eU Cau 32 ) D Cau 36 ) C AK > Km = 49,1 pm Cau 33 ) B Cau 37 ) A Cau 34 ) D Cau 38 ) B 215 CS .39 )B M „ - M ... kich thich B giam giam buac song cua anh sang kich thich C tang tSng cuong dp cua chiim sang kich thich D giam tSng cuong dp chiim sang kich thich Cau 53) Mpt v^t ran dang quay deu quanh tryc thi ... thay Cau 30 ) Cho h = 6,625.lO"'''Js; c = 3. 10* m/s Buac song giai h^n quang difn ciia kim lo^ii la XQ= 0,6 ^ m Cong thoat ciia k i m loai bang B.20,7eV C .3, 31.I0"'J A .3, 31.10-^''J Cau 31 ) Do thj...