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Electron, Photon, Photoelectric Effect and X-Rays — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectron, Photon, Photoelectric Effect and X-Rays1 Mark
MCQ
Solid targets of different elements are bombarded by highly energetic electron beams. The frequency $(f)$ of the characteristic $X-$rays emitted from different targets varies with atomic number $Z$ as
  • A
    $f \propto \sqrt{Z}$
  • ✓
    $f \propto \mathrm{Z}^2$
  • C
    $f \propto Z$
  • D
    $f \propto \mathrm{Z}^{3 / 2}$
✓

Answer

Correct option: B.
$f \propto \mathrm{Z}^2$
$f \propto \mathrm{Z}^2$

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