The wavelength of Kα X-ray of an element having atomic number Z = 11 is λ . The wavelength of Kα X-ray of another element of atomic number Z' is 4λ. Then Z' is
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The wavelength of Kα X-ray of an element having atomic number Z = 11 is λ . The wavelength of Kα X-ray of another element of atomic number Z' is 4λ. Then Z' is

G1 Physics · Accepted Answer

Step 1: For continuous X-rays use the Duane-Hunt relation λₘᵢₙ = hc/(eV). Step 2: For characteristic lines use the difference of shell binding energies or Moseley's law √ν ∝ (Z − b). Using the stated data gives C: 6.