PhysicsEasy145×since 2002Q6612Sodium and copper have work functions 2.32.32.3 eVeVeV and 4.54.54.5 eVeVeV respectively. Then the ratio of the wavelengths is nearest toA1:21:21:2B4:14:14:1C2:12:12:1D1:41:41:4Check answerSkip