What is the minimum frequency light must have to eject an electron from the surface?
The minimum energy required to eject an electron from the surface is called the photoelectric work function. The threshold for this element corresponds to a wavelength of 683 nm. Using this wavelength in the Planck relationship gives a photon energy of 1.82 eV.
What is the minimum frequency of light required to observe the photoelectric effect on PD?
This frequency which is unknown and work function is 5.2 electron volts. So one little bullet From 2016 to 10 to the power minus 19 june. This gives us F equal to 1.26 into 10 to the power 15 hertz. This is a required minimum frequency of the photo or the frequency of light.
What is the minimum frequency of a photon that can eject a photoelectron?
The minimum frequency of photon required to eject electron from the indium metal surface is 9.88×1014 Hz.
What is the name of the minimum frequency required for the photoelectric effect to occur?
threshold frequency
This minimum frequency is also called the threshold frequency, and the value of ν0\nu, start subscript, 0, end subscript depends on the metal. For frequencies greater than ν0\nu, start subscript, 0, end subscript, electrons would be ejected from the metal.
What is the minimum frequency of light needed?
The minimum frequency of light needed to eject electrons from a metal is called the threshold frequency, ν0.
What is the work function of hydrogen?
The work function is measured via the photoelectric effect, showing that long-term hydrogen plasma exposure results in a steady-state surface work function of 2.75±0.10 eV.
What is the minimum frequency of a photon?
We use the famous expression for the energy of a photon: E = hf where h is Planck’s constant, f is the frequency of the photon and E is the energy. Rearranging the equation for the frequency gives: f = E/h. Now, subbing in the values: f = (5.15 x 1.6 x10^-19)/6.63×10^-34 gives the final answer of f = 1.24 x 10^15 Hz.
What is the threshold frequency?
Definition of threshold frequency : the minimum frequency of radiation that will produce a photoelectric effect.
What is the minimum frequency needed to eject the electrons from the sodium metal?
The threshold frequency of sodium metal is 5.49 × 1014 s–1 = 5.49 × 1014 Hz.
What is the frequency when a metal is exposed to photons?
When a metal was exposed to photons at a frequency of 4.68× 1015 s–1, electrons were emitted with a maximum kinetic energy of 5.70× 10–19 J.
What is the threshold frequency of incident radiation?
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.
How does the frequency of the incident photon affect the photoelectron?
If the frequency of the photon is exactly equal to the threshold frequency (𝜈 = 𝜈 th), there will be an emission of photoelectrons, but their kinetic energy will be equal to zero. An illustration detailing the effect of the frequency of the incident light on the kinetic energy of the photoelectron is provided below.
Why does the photoelectric effect not occur when red light strikes metal?
The photoelectric effect does not occur when the red light strikes the metallic surface because the frequency of red light is lower than the threshold frequency of the metal. The photoelectric effect occurs when green light strikes the metallic surface and photoelectrons are emitted.
What is the relationship between threshold frequency and photoelectric current?
The threshold frequency varies with material, it is different for different materials. The photoelectric current is directly proportional to the light intensity. The kinetic energy of the photoelectrons is directly proportional to the light frequency.