When light of wavelength λilluminates a copper surface, the stopping potential is V. In terms of

step 1 According to Einstein's photoelectric equation, I can write the expression as E is equal to 5 pl

When light of wavelength λilluminates a copper surface, the...

When light of wavelength $\lambda$ illuminates a copper surface, the stopping potential is $V$. In terms of $V$, what will be the stopping potential if the same wavelength is used to illuminate a sodium surface?

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Work Function

The work function is the minimum energy required to remove an electron from the surface of a metal. Different metals have different work functions, and this difference directly influences how easily electrons are emitted under illumination by light of a given frequency.

Stopping Potential

The stopping potential is the voltage needed to stop the fastest photoelectrons emitted from a metal surface. It is directly related to the maximum kinetic energy of the electrons, which is determined by subtracting the work function from the photon energy. When comparing different metals under identical illumination, variations in stopping potential reflect the differences in their work functions.

Photoelectric Effect

This phenomenon occurs when electromagnetic radiation, such as light, strikes a metal surface and ejects electrons. The effect demonstrates that light can behave as both a wave and a particle, with each photon carrying a quantum of energy that must overcome the binding energy (work function) of the electrons in the metal.

Transcript

Please give Ace some feedback