Which of the following graphs is correct for the photoelectric effect?

Name: Problem 24, Chapter 13: Advanced Problems in Physical Chemistry for Competitive Examinations
Uploaded: 2021-10-23T13:39:11-08:00
Duration: 2 min 6 s
Channel: Jhamku Devi
Description: Which of the following graphs is correct for the photoelectric effect?

step 1 Hello students, subscribe to this question, we know that Hmue equal to kinetic energy plus phi.

Which of the following graphs is correct for the...

Key Concepts

Photoelectric Effect

This phenomenon involves the emission of electrons from a material when light of sufficient frequency shines on it. It is a key experiment that demonstrated the quantum nature of light, showing that light energy is quantized in discrete amounts called photons.

Threshold Frequency

The threshold frequency is the minimum frequency of light required to eject electrons from a material. Below this frequency, no electrons are emitted regardless of light intensity, because the photon energy is insufficient to overcome the material's work function.

Work Function

The work function is the minimum energy needed to remove an electron from the surface of a material. It is a characteristic property of the material and is directly related to the threshold frequency by the relation ? = hf?, where h is Planck’s constant and f? is the threshold frequency.

Einstein’s Photoelectric Equation

Einstein’s equation, KE = hf ? ?, quantifies the maximum kinetic energy (KE) of the emitted electrons, showing a linear relationship with the frequency of the incident light. This relation implies that excess photon energy beyond the work function is converted into the kinetic energy of the photoelectrons.

Graphical Representation of the Photoelectric Effect

In diagrams illustrating the photoelectric effect, the graph typically plots the maximum kinetic energy of the emitted electrons (or corresponding stopping potential) against the frequency of the incident light. The graph is a straight line with a slope equal to Planck’s constant and a cutoff at the threshold frequency, below which no electrons are emitted.

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