Calculating KE of Slowest Emitted Photoelectron

  • Thread starter kingyof2thejring
  • Start date
In summary, the slowest emitted photoelectron in the photoelectric effect has a kinetic energy of zero, as it is emitted with a velocity of zero. This occurs when the energy of the incident photon is equal to the work function of the metal.
  • #1
kingyof2thejring
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0
how do you calculate the kintetic energy of the slowest emitted photoelectron? i know how to calculate the KE of the fastest emitted photoelectron.
 
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  • #2
?Not sure I get this

Surely there is a spectra of ke from 0 - ke.max, so the lowest possible ke = 0 which gives v=0?

- does v=0 count as slow or stopped?

What exactly is the wording of the question?
 
  • #3
I assume you're talking about the photoelectric effect. The slowest emitted photoelectron is emitted with speed zero.
 
  • #4
hf=work function of metal + 1/2mv2...slowest emitted electron would be when hf=work function metal so leaving zero kinetic energy for emitted electrons resulting in 0 velocity.
 

Related to Calculating KE of Slowest Emitted Photoelectron

1. What is the formula for calculating the kinetic energy (KE) of the slowest emitted photoelectron?

The formula for calculating the KE of the slowest emitted photoelectron is KE = 1/2 * m * v^2, where m is the mass of the photoelectron and v is its velocity.

2. How is the mass of the photoelectron determined?

The mass of the photoelectron can be determined using the photoelectric effect, where the energy of the emitted electron is measured and the mass can be calculated using the equation E = h * f = m * v^2, where h is Planck's constant, f is the frequency of the incident light, and v is the velocity of the electron.

3. What units are typically used for the KE of the slowest emitted photoelectron?

The KE of the slowest emitted photoelectron is typically measured in units of electron volts (eV) or joules (J).

4. How does the KE of the slowest emitted photoelectron relate to the energy of the incident light?

The KE of the slowest emitted photoelectron is directly proportional to the energy of the incident light. This means that as the energy of the incident light increases, the KE of the emitted photoelectron will also increase.

5. How does the speed of the slowest emitted photoelectron compare to the speed of the incident light?

The speed of the slowest emitted photoelectron will always be less than the speed of the incident light. This is because some of the energy of the incident light is used to overcome the binding energy of the electron in the material, leaving less energy available for the kinetic energy of the emitted electron.

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