... th t: x10 x4 = 10.i 4.i= 6. i =3,6mm i = 0,6mm = 0 ,6. 10-3mBc súng: 3 3 6 0 ,6. 10 .0 ,6. 100 ,6. 10 6 1aim mD à = = = =VII.23. B.Hng dn: 6 330 ,6. 10 .21,2.10 1,210Di m mma= ... 41 ,6 2 ,5 2 ,5 xmm= =Võn sỏng bc 4 cỏch võn trung tõm: x4 = 4.i = 6, 4mm.VII.29. D.Hng dn: 6 330 ,6. 10 .2 ,5 1 ,5. 10 1 ,5 10Di m mma= = = =S võn trờn mt na trng giao thoa: 12 ,5 4, 16 2 ... 0, 75 30,4 0, 75 4 7,5kk v kZ.Chn k = 4 ,5, 6, 7: Cú 4 bc x cho võn sỏng ti ú.VII.39. Hng dn: Khong võn: 6 330 ,6. 10 .31,8.10 1,810Di m mma= = = =Xột t s: 6, 3 6, 33 ,5 1,8i=...