Question

In photoelectric effect what determines the maximum velocity of the electron reacting with the collector? *

Answer 1

Answer:

The frequency of the incident radiations and work function of the metallic surface.

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Answer 2

Answer:

The maximum velocity of the electron reacting with the collector is determined by the frequency of the incident radiation(ν), on the work function(hν₀), and the potential difference of the collector.

Explanation:

We can answer this question by observing the following relation in the photoelectric effect,

$E=E_0+K_m_a_x$            (1)

Where,

E=energy of incident radiation=hν

E₀=work function of the metal=hν₀

ν=incident frequency

ν₀=threshold frequency

Kmax=1\2 ×mV²max=eV     (2)

e=charge on electron

V=potential difference of the collector

We also write equation (1) as,

$\frac{1}{2}m\times V^2_m_a_x=E-E_0=eV$

$h\nu-h\nu_0=eV$            (3)

Hence, from equation (3) we can see that the maximum velocity of the electron reacting with the collector is determined by the frequency of the incident radiation(ν), on the work function(hν₀), and the potential difference of the collector.