## What is the threshold frequency that causes electrons to be ejected sodium?

4.40×1014 Hz
Sodium metal has a threshold frequency of 4.40×1014 Hz.

## What is the threshold frequency of an electron?

The threshold frequency is the frequency of light that carries enough energy to dislodge an electron from an atom. This energy is entirely consumed in the process (see References 5). Therefore, the electron gets no kinetic energy at the threshold frequency and it is not released from the atom.

What does the threshold frequency determine?

The threshold frequency is defined as the minimum frequency of the incident radiation below which photoelectric emission or emission of electrons is not possible. The threshold frequency refers to the frequency of light that will cause an electron to dislodge emit from the surface of the metal.

Will the electron eject if the frequency of light is less than threshold frequency?

If the incoming light’s frequency, v, is below the threshold frequency, there will never be enough energy to cause electron to be ejected. If the frequency is equal to or higher than the threshold frequency, electrons will be ejected.

### What is threshold frequency in photoelectric effect?

Threshold Frequency (γth) It is the minimum frequency of the incident light or radiation that will produce a photoelectric effect i.e. ejection of photoelectrons from a metal surface is known as threshold frequency for the metal. It is constant for a specific metal but may be different for different metals.

### How do you calculate the number of electrons ejected?

The voltage that stops the electrons from reaching the wire equals the energy in eV. For example, if –3.00 V barely stops the electrons, their energy is 3.00 eV. The number of electrons ejected can be determined by measuring the current between the wire and plate.

What is meant by threshold frequency in the photoelectric effect?

Threshold frequency can be defined as the minimum frequency of light which causes the electrons to be emitted from a metal surface when the light falls on it.

Will higher frequency light eject greater number of electrons than low frequency light?

High frequency light won’t necessarily eject a greater number of electrons from the photosensitive surface as the number of ejected electrons is often proportional to the number of incident photoelectrons. It is also affected by the brightness of the light. Frequency doesn’t have any effect.

#### What is the minimum energy required to remove an electron?

The minimum energy required to remove an electron from the ground state to outside the atom is called ionization energy.