Consider a thin target (m square, m thickness) of sodium, which produces a photocurrent of 100µA when a light of intensity 100W/m2 (λ = 660nm) falls on it. Find the probability that a photoelectron is produced when a photon strikes a sodium atom. [Take density of Na = 0.97 kg/m3].

contexto.120

3 years ago

Area = 10^-4 m²

Thickness = 10^-3 m

Current = 10^-4 A

Intensity = 100 W/m²

Mass = (volume)(density) = 0.97 × 10^-4 gm

No.of target atoms = 0.254 × 10¹⁹

Total energy = nhv

Where n = 3.3 × 10¹⁶

The probability of emission of photoelectrons is 7.5 × 10^-21