Question

The threshold wavelength for photoelectric effect on sodium is 5000 . Its work function is:

Answer 1

LHello dear,

◆ Answer -

Φ = 3.978×10^-19 J

◆ Explanation -

# Given -

λ = 5000 A° = 5×10^-7 m

# Solution -

Work function of material is calculated by -

Φ = hc/λ

Φ = 6.63×10^-34 × 3×10^8 / 5×10^-7

Φ = 3.978×10^-19 J

Therefore, work function of sodium metal is 3.978×10^-19 J.

Thanks dear...