0
Why for a particular metal electrons are emitted only when the frequency of the incident radiation is greater than a certain value?
Electrons are emitted from a metal surface when the energy of the incident photons is great enough to overcome the work function of the metal. This minimum energy required is equivalent to a certain threshold frequency, known as the threshold frequency. Electrons can only be emitted when the frequency of the incident radiation is greater than this threshold frequency because lower frequency photons do not possess enough energy to overcome the work function and release electrons from the metal surface.
What else can I help you with?
Use Einstein photoelectric equation to explain Why for a particular metal electrons are emitted only when the frequency of the incident radiation is greater than a certain value?
The photoelectric effect occurs when photons with sufficient energy strike a metal surface, causing electrons to be emitted. According to the Einstein photoelectric equation, the energy of the emitted electron is equal to the energy of the incident photon minus the work function of the metal. Therefore, only photons with energy greater than the work function of the metal can overcome the binding energy of the electrons and cause emission. This is why electrons are emitted only when the frequency (or energy) of the incident radiation is greater than a certain value.
What is the frequency in photoelectric effect?
In the photoelectric effect, the frequency of incident light determines the energy of the ejected electrons from a material. Electrons are only emitted from the material when the frequency of the incident light is greater than the threshold frequency, which is unique to each material.
How can the frequency of incident radiation be varied?
The frequency of incident radiation can be varied by changing the energy level of the source emitting the radiation. For example, in the case of electromagnetic radiation like light, increasing the energy of the source (such as a higher voltage in the case of X-rays) will result in higher frequency radiation. Similarly, for radioactive decay processes, the frequency of emitted radiation can be controlled by manipulating the radioactive material's properties.
What is incoherent scattering?
Incoherent scatteringis a type of scattering phenomenon in physics. The term is most commonly used when referring to the scattering of an electromagnetic wave (usually light or radio frequency) by random fluctuations in a gas of particles (most often electrons).
Why the wave model for radiation does not account for the photoelectric effect?
Predictions of the wave model: Energy of light was dependent on the amplitude of the light wave, which was manifested as the brightness of the light. Higher amplitude (brighter) light would cause the ejected electrons to be more energetic. Colour of light was dependent on the frequency of the light but frequency had no bearing on the energy of the ejected photons. Predictions of the photon model: Both the energy of light and the colour of light was dependent on the frequency of the photons. Higher frequency would cause the the ejected electrons to be more energetic. The number of photons was manifested as the brightness of the light. Higher number of photons (brighter) light would cause the ejected electrons to be more numerous (higher current). Observations from the photoelectric effect experiment: Ejected electron energy was directly related to the frequency of the light and brighter light resulted in higher current. These observations were explained by the photon model and could not be explained with the wave model.
Use Einstein photoelectric equation to explain Why for a particular metal electrons are emitted only when the frequency of the incident radiation is greater than a certain value?
The photoelectric effect occurs when photons with sufficient energy strike a metal surface, causing electrons to be emitted. According to the Einstein photoelectric equation, the energy of the emitted electron is equal to the energy of the incident photon minus the work function of the metal. Therefore, only photons with energy greater than the work function of the metal can overcome the binding energy of the electrons and cause emission. This is why electrons are emitted only when the frequency (or energy) of the incident radiation is greater than a certain value.
What is the frequency in photoelectric effect?
In the photoelectric effect, the frequency of incident light determines the energy of the ejected electrons from a material. Electrons are only emitted from the material when the frequency of the incident light is greater than the threshold frequency, which is unique to each material.
How can the frequency of incident radiation be varied?
The frequency of incident radiation can be varied by changing the energy level of the source emitting the radiation. For example, in the case of electromagnetic radiation like light, increasing the energy of the source (such as a higher voltage in the case of X-rays) will result in higher frequency radiation. Similarly, for radioactive decay processes, the frequency of emitted radiation can be controlled by manipulating the radioactive material's properties.
What is an absorptance?
An absorptance is a ratio measuring absorbed radiation and incident radiation - to show how well a particular surface absorbs radiation.
What is incoherent scattering?
Incoherent scatteringis a type of scattering phenomenon in physics. The term is most commonly used when referring to the scattering of an electromagnetic wave (usually light or radio frequency) by random fluctuations in a gas of particles (most often electrons).
Why the wave model for radiation does not account for the photoelectric effect?
Predictions of the wave model: Energy of light was dependent on the amplitude of the light wave, which was manifested as the brightness of the light. Higher amplitude (brighter) light would cause the ejected electrons to be more energetic. Colour of light was dependent on the frequency of the light but frequency had no bearing on the energy of the ejected photons. Predictions of the photon model: Both the energy of light and the colour of light was dependent on the frequency of the photons. Higher frequency would cause the the ejected electrons to be more energetic. The number of photons was manifested as the brightness of the light. Higher number of photons (brighter) light would cause the ejected electrons to be more numerous (higher current). Observations from the photoelectric effect experiment: Ejected electron energy was directly related to the frequency of the light and brighter light resulted in higher current. These observations were explained by the photon model and could not be explained with the wave model.
Why there is a cutoff requency in the photoelectric effect?
In any circumstance where a threshold of energy is required to free an electron from a bound state, an incoming photon must have at least that energy to do the job. The energy of a photon is proportional to the frequency of the light, so the minimum energy corresponds to a minimum frequency of the light, or maximum wavelength necessary to free an electron. This observation was a major step in the development of radiation theory (Einstein).
When light shines on a metal surface the maximum energies of emitted electrons?
depend on the frequency of the incident light. The maximum energy of emitted electrons is given by the equation E = hf - φ, where E is the maximum energy, h is Planck's constant, f is the frequency of the incident light, and φ is the work function of the metal.
Why the kinetic energy of the emitted electrons varies up to a maximum value?
Let the work function of a metal be W. Let C be a constant of the dimension of energy. if Kis the maximum kinetic energy of an electron then.......W=C-K..... (K HERE IS THE ENERGY SUPLIED BY A PHOTON TO THE ELECTRON)
What is the relationship between frequency and kinetic energy in photoelectric effect?
In the photoelectric effect, increasing the frequency of incident light increases the kinetic energy of the emitted electrons. This is because higher frequency light photons carry more energy, which can be transferred to the electrons during the photoelectric effect.
How does the incident frequency compare to the reflected frequency?
Incident frequency is the original frequency of an incoming wave, while reflected frequency is the frequency of the wave that is bounced back after hitting a boundary. In general, the incident frequency is the same as the reflected frequency because the wave retains its original frequency upon reflection, assuming no frequency changes occur due to the medium.
What is the effect of frequency of incident light on photoelectric current?
The photoelectric effect is based on two principles. 1. The intensity or brightness of the visible light (number of photons): The higher the intensity (larger number of photons) determines the number of electrons that are released from the surface material. 2. The frequency of visible light (wavelength): The higher the frequency a beam of light has when it strikes the surface determines the speed (kinetic energy) of the electrons that are ejected from the material. This is independent from light intensity. The higher the frequency of the light, the higher the energy of the electrons emitted, and thus, the higher the current of the circuit.
