The work function of platinum is 6.35 eV. The threshold frequency of platinum is

Question

The work function of platinum is 6.35 eV. The threshold frequency of platinum is (A) 15.32 × 1014 Hz (B) 15.32 × 1016 Hz (C) 15.32 × 1019 Hz (D) 15.32 × 1018 Hz

Tardigrade Admin · Accepted Answer

Work-function φ0=h v0 Then threshold frequency v0=(φ0/h)=(6.35 × 1.6 × 10-19/6.63 × 10-34) =15.32 × 1014 Hz

Q. The work function of platinum is $6.35 e V$ . The threshold frequency of platinum is

$15.32 \times 1 0^{14} Hz$

$15.32 \times 1 0^{16} Hz$

$15.32 \times 1 0^{19} Hz$

$15.32 \times 1 0^{18} Hz$

Work-function $ϕ_{0} = h v_{0}$
Then threshold frequency
$v_{0} = \frac{ϕ _{0}}{h} = \frac{6.35 \times 1.6 \times 1 0 ^{- 19}}{6.63 \times 1 0 ^{- 34}}$
$= 15.32 \times 1 0^{14} Hz$

Q. The work function of platinum is 6.35eV. The threshold frequency of platinum is

15.32×1014Hz

15.32×1016Hz

15.32×1019Hz

15.32×1018Hz