Question

In the context of the photoelectric effect, what is the threshold frequency \( f_0 \) for a metal if the work function is \( \phi = 2 \, \text{eV} \)?

• A. \( \frac{\phi}{h} \)
• B. \( \frac{2\phi}{h} \)
• C. \( \frac{\phi}{2h} \)
• D. \( \frac{\phi}{hc} \)

Hint:

In the photoelectric effect, the threshold frequency is the frequency required to overcome the work function and eject electrons from the metal surface.

Answer 1

The Correct Option is A

The threshold frequency \( f_0 \) is related to the work function \( \phi \) by the equation: \[ f_0 = \frac{\phi}{h}, \] where \( h \) is Planck's constant. Since the work function is given as \( \phi = 2 \, \text{eV} \), the correct threshold frequency is \( \frac{\phi}{h} \).