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AP EAMCET202119 Aug 2021Evening ShiftChemistryStructure of AtomActual

If the energies of two light radiations E 1 and E 2 are 25 eV and 100 eV respectively, then their respective wavelengths λ 1 and λ 2 would be in the ratio λ 1 : λ 2 =

Options

  1. A2 : 1
  2. B4 : 1
  3. C1 : 4
  4. D1 : 2

Correct answer

B. 4 : 1

Step-by-step solution

According to Plank's quantum theory, energy of the incident wave can be expressed as: E   =   hc λ Energies of different radiation are given i.e. E 1 = 25 eV ,           E 2 = 100   eV Now, E 1   =   hc λ 1               ⇒       λ 1 = hc E 1 E 2   =   hc λ 2             ⇒       λ 2 = hc E 2 So the ratio of wavelength at di

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