Drag the wavelength below through the threshold and watch the current switch on
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Below threshold (no emission)
UV on caesium
Find the stopping voltage
High intensity
Wavelength
400 nm
Light intensity
70%
Metal
φ = 2.28 eV
Caesium — 2.10 eV
Sodium — 2.28 eV
Calcium — 2.87 eV
Zinc — 4.30 eV
Copper — 4.70 eV
Silver — 4.73 eV
Platinum — 6.35 eV
Retarding voltage
0.0 V
Photon energy
3.10 eV
Work function
2.28 eV
Max KE of electrons
0.82 eV
Stopping voltage
0.82 V
Threshold wavelength
544 nm
Photocurrent
70%
Photoelectric Effect ↗ LK Forge
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