Cdu 52: De k i e m chuTng hieu ufng Dop-ple, ngu&i t a bo t r i t r e n m o t difdng r a y t h S n g m o t nguon a m chuyen dpng deu v d i toe 30 m/s, phat a m vdfi t a n so xac d i n h va m o t m a y t h u a m dufng yen B i e t a m t r u y e n t r o n g k h o n g k h i v6i toe 340 m/s K h i nguon a m l a i gan t h i m a y t h u diTpc t a n so a m l a 740 H z K h i nguon a m r a xa t h i may t h u diXpc t a n so a m l a : A 620 H z B 820 H z C 780 H z D 560 Hz Giai Khi nguon a m l a i g a n m a y t h u , t a c6: f, - ^ f =>f = f , v - v ^ V = M z ^674,7Hz 340 K h i nguon a m r a xa m a y t h u , t a c6: 340 = — 674,7 = 620Hz 370 V f, = f v + v^ Vay chgn dap an A Cdu 53: C h u m t i a X p h a t r a tCf m o t ong t i a X (ong Cu-lit-gicf) c6 t a n so Idrn n h a t l a 6,4.10^^Hz Bo qua dong nang cac electron k h i buft r a k h o i catot H i e u d i e n t h e giuTa anot va catot cua ong t i a X l a : A 13,25 k V B 5,30 k V C 2,65 k V D 26,50 k V G\k\ Theo d i n h l u a t bao toan nSng lupng, chiing t a coi nang lifpng electron dap vao tarn k i m loai b k n g nang li/png cua photon t i a X phat ra: eU = h f hf 6,625.10-".6,4.10'' ^mH/