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Electron, Photon, Photo-electric Effect and X-Rays — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectron, Photon, Photo-electric Effect and X-Rays1 Mark
MCQ
The photoelectric threshold wavelength for a metal surface is $6600\ A$. The work function for this is
  • A
    $1.87 \mathrm{~V}$
  • ✓
    $1.87 \mathrm{eV}$
  • C
    $18.7 \mathrm{eV}$
  • D
    $0.18 \mathrm{eV}$
✓

Answer

Correct option: B.
$1.87 \mathrm{eV}$
$W_0=\frac{12375}{6600}=1.87 \mathrm{eV}$.

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