1) The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., λ1 and λ2 will be : A) λ1=λ2 B) λ1=2λ2 C) λ1=4λ2 D) λ1=1/2λ2 Answer: Option BExplanation:Given E1 = 25 eV E2 = 50 eV E1=hcλ1 E2=hcλ2 ∴E1E2=λ2λ1 ∴λ2λ1=2550 = 1/2 ∴λ1=2λ2