Can brighter light increase stopping potential?

A clean photosurface has work function 2.2 eV. Monochromatic light delivers photons of energy 3.7 eV. The intensity is doubled while the photon energy and surface remain unchanged.

What is the stopping-potential magnitude after the intensity is doubled?

Organize the givens & assumptions

Work function: 2.2 eV
Photon energy: 3.7 eV
Only intensity is doubled

Ordinary single-photon photoemission; neglect contact potentials, space-charge effects and heating. The stopping potential is the retarding voltage needed to stop even the most energetic emitted electrons.

A $0.75\ \mathrm{V}$
B $1.5\ \mathrm{V}$
C $3.0\ \mathrm{V}$
D $5.2\ \mathrm{V}$

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