C HAPTER . (a) . × Hz (b) . nm .
eV (b) . × photons/s . . V .
No, because +$ + o . . × Hz . .
nm . (a) Use eV = ( m v / ) i.e., v = [( eV / m )] / ; v = . × m s – . (b) If we use the same formula with V = V, we get v = .
× m s – . This is clearly wrong, since nothing can move with a speed greater than the speed of light ( c = × m s – ). Actually, the above formula for kinetic energy ( m v / ) is valid only when