The work function of calcium is 2.14 eV. Find the threshold frequency for calcium.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $5.16 × 10^{14} Hz$
The threshold frequency $(V_0)$ is,
Work function, $\phi=hv_0$
$⇒v_0=\frac{\phi}{h}=\frac{3.43×10^{-19}}{6.626×10^{-34}}$
$=5.16×10^{14}Hz$