Question

When green light is incident on the surface of metal, it emits photo-electrons but there is no such emission with yellow colours light. Which one of the colours can produce emission of photoelectrons?

• A. Orange
• B. Red
• C. Indigo
• D. None

Answer 1

Answer: (D)

None

Answer 2

eV₀ = hn – φ

V₀ = n – $\frac { \phi } { \mathrm { e } }$