When Light of Wavelength $350 \mathrm {~nm}$ Is Incident on a Metal Surface, the Stopping Potential of a Metal

Multiple Choice

When light of wavelength $350 \mathrm {~nm}$ is incident on a metal surface, the stopping potential of the photoelectrons is $0.500 \mathrm {~V}$ . What is the threshold (cutoff) frequency of this metal? $\left( c = 3.00 \times 10 ^ { 8 } \right.$ $\mathrm { m } / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } , 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J}$ )

A) $3.74 \times 10 ^ { 14 } \mathrm {~Hz}$
B) $7.36 \times 10 ^ { 14 } \mathrm {~Hz}$
C) $3.47 \times 10 ^ { 14 } \mathrm {~Hz}$
D) $4.73 \times 10 ^ { 14 } \mathrm {~Hz}$