(1-8) (2-8) : ( ) ( ) ( ) ( ) (T4) () ( ) 1900 E = n h f 6.626x10-34 j/Hz 0,1,2,3 (E) (hf,2hf,3hf) (2/3hf,3/4hf) (3hf) (2hf) (hf) (h) () () (f0) (fo) . :(1) ( )(2) ( ) ( ) E = hf (eV)1 eV= (1.6x10-19 c)x(1 V) = 1.6x10-19 jE = ___ = ____hc1240 (eV) (nm) (fo) (fo) (hf - hfo) KE = hf - hfo ( ) KE = -q Vo(1.6x10-19 c) (J/c) (1) : (2) : (3) : : = ____ = hKEf (W) : (hfo) (p) (E/c) P=E/c , E=hf , f/c=1/P = ___ = ___hfch (X) (X) (X) (X) (X) ( ) 1923 (p) (mv) (p) (h/) p = mv = ___h : = ___ = ___hphmv (X) () : .