i) The threshold frequency of A is
vOA = 5 × 1014 Hz
The threshold frequency of B is
vOB = 10 × 1014 Hz
Work function is ϕ = hv0
ϕOA/ ϕOB = 5 × 1014/10 × 1014 < 1
ϕOA < ϕOB
i) The threshold frequency of A is
vOA = 5 × 1014 Hz
The threshold frequency of B is
vOB = 10 × 1014 Hz
Work function is ϕ = hv0
ϕOA/ ϕOB = 5 × 1014/10 × 1014 < 1
ϕOA < ϕOB