The threshold frequency ν₀ for a metal is related to its work function…

Question

The threshold frequency ν₀ for a metal is related to its work function by

Accepted Answer

D. {'text': 'φ₀ = hν₀', 'label': 'D'}

1. At threshold frequency, incident photons exactly free electrons with K_max = 0.
2. Einstein's equation: hν = φ₀ + K_max.
3. Setting ν = ν₀ and K_max = 0: hν₀ = φ₀.
4. Below ν₀, photons have too little energy to overcome φ₀ and no photoemission occurs.
_Source: NCERT Class 12 Physics, Ch 11 "Dual Nature of Radiation and Matter", §11.5_

Answer

{'text': 'φ₀ = h ν₀²', 'label': 'A'}

Answer

{'text': 'φ₀ = h/ν₀', 'label': 'B'}

Answer

{'text': 'φ₀ = ν₀/h', 'label': 'C'}