What is the maximum number of electrons that could be ejected from this metal by a burst of photons at some other frequency with a total energy of 5.45 10 − 7 J?
1 Expert Answer Each photon can free at most one electron, so the maximum number of freed electrons will be 2.346 x 1012 electrons.
How do you find the maximum number of electrons ejected?
The maximum number of electrons released would be the total energy divided by the work function–just enough energy to release them.
How do you calculate ejected electrons?
1:178:15How to calculate the speed of an ejected electron during … – YouTubeYouTubeStart of suggested clipEnd of suggested clipI have a conversion factor right down here it just tells us that one a V is equal to one point sixMoreI have a conversion factor right down here it just tells us that one a V is equal to one point six oh two times 10 to the minus 19 joules. And so that's the very first step is just converting.
What is the maximum kinetic energy of electrons that are ejected from the metal?
Chemistry. Q. The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2×1014s−1 is 6.63×10−20J.
How do you calculate the photoelectric effect?
You can see from the photoelectric equation that the condition f > f0 is necessary for the photoelectric effect to occur (because kinetic energy is positive). The quantity ϕ = h * f0 is called work function (expressed in units of energy) and it corresponds to the threshold frequency.
What is the formula of photoelectric effect?
By conservation of energy, this reasoning led Einstein to the photoelectric equation Ek = hf − ϕ, where Ek is the maximum kinetic energy of the ejected electron.
What is the maximum number of electrons that could be ejected from this metal by a burst of photons at some other frequency with a total energy of 2.78 10 − 7 J?
What is the maximum number of electrons that could be ejected from this metal by a burst of photons at some other frequency with a total energy of 2.78 10 − 7 J? Each photon can free at most one electron so the maximum number of freed electrons will be 2.346 x 1012 electrons.
How do you calculate energy of ejected photon?
4:3322:57Photoelectric Effect, Work Function, Threshold Frequency, Wavelength …YouTube
How do you solve the photoelectric effect?
You can see from the photoelectric equation that the condition f > f0 is necessary for the photoelectric effect to occur (because kinetic energy is positive). The quantity ϕ = h * f0 is called work function (expressed in units of energy) and it corresponds to the threshold frequency.
How do you find the maximum kinetic energy of a photoelectron?
The maximum kinetic energy of a photoelectron is given by 𝐸 = ℎ 𝑐 𝜆 − 𝑊 , m a x where ℎ is the Planck constant, 𝑐 is the speed of light, 𝜆 is the wavelength of the incident photon, and 𝑊 is the work function of the metal surface.
What is the maximum kinetic energy that a released electron could have?
ANSWERS: The maximum wavelength for this electron ejection to occur is 277 nm. The maximum kinetic energy for the electron ejected with 190.2 nm…
How are photons measured calculated?
According to the equation E=n⋅h⋅ν (energy = number of photons times Planck's constant times the frequency), if you divide the energy by Planck's constant, you should get photons per second.
Why did Einstein win the Nobel Prize?
The Nobel Prize in Physics 1921 was awarded to Albert Einstein "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect." Albert Einstein received his Nobel Prize one year later, in 1922.
What is photo electric effect using Einstein’s photo electric equation explain characteristics of the effect?
Two characteristics of the photoelectric effect: where, hν = energy of the photon of incident radiation. hv ϕ 0 = hv 0 = photoelectric work function of the metal. Thus, both the terms on the R.H.S of equation (2) depends on the frequency and not on the intensity of radiation.
How do you calculate the work of the photoelectric effect?
You can see from the photoelectric equation that the condition f > f0 is necessary for the photoelectric effect to occur (because kinetic energy is positive). The quantity ϕ = h * f0 is called work function (expressed in units of energy) and it corresponds to the threshold frequency.
What is the longest wavelength of light that will eject electrons from a metal with a work function of 4.9 eV?
The longest wavelength of light that will cause an electron to be emitted from a metal is 520 nm….
How do you find maximum energy?
The maximum energy of an emitted electron is equal to the energy of a photon for frequency f (i.e., E = hf ), minus the energy required to eject an electron from the metal's surface (the so-called work function).
How much energy does it take to eject an electron?
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.
How do you convert photon to electron?
Photovoltaics turn photons into electrons by what is called the “photovoltaic” effect, (photo meaning light, and voltaic meaning electricity). In the photovoltaic effect, rays of photons in the sunlight strike the surface of the silicon semiconductor material liberating free electrons from the materials atoms.
What will be the maximum kinetic energy of the photoelectrons if a certain metal is illuminated with a light of frequency?
When a metal is illuminated with light of frequency f the maximum kinetic energy of the photo-electrons is 1.2 eV.
How do you find maximum kinetic energy?
0:260:53Physics:2.1.9.2 Determining the maximum kinetic energy … – YouTubeYouTube
How do I calculate kinetic energy?
If you know the mass and velocity of an object, use the kinetic energy calculator to find it's energy in movement….To calculate kinetic energy:
- Find the square of the velocity of the object.
- Multiply this square by the mass of the object.
- The product is the kinetic energy of the object.
Apr 26, 2022
How do you calculate the number of photons released?
According to the equation E=n⋅h⋅ν (energy = number of photons times Planck's constant times the frequency), if you divide the energy by Planck's constant, you should get photons per second. Eh=n⋅ν → the term n⋅ν should have units of photons/second.
How can I find the number of photons?
Solution : Energy of N photons = Nhv <br> Number of photons emitted per sec `= n = (N)/(t)` <br> `therefore` power `= (Nhv)/(t ) = nhv` <br> `n =(P)/(hv) = (10 xx 10 ^(3))/(6.63 xx 10 ^(-34) xx 6 xx 10 ^(5)) = 2. 5 xx 10 ^(31)` photon/sec.
What was Einstein’s IQ level?
2. Albert Einstein. Albert Einstein was a German-born theoretical physicist and philosopher of science whose estimated IQ scores range from 205 to 225 by different measures.
How old is Albert Einstein?
76 years (1879–1955)Albert Einstein / Age at death
What is photo electric effect explain it on the basis of quantum theory also explain stopping potential and threshold frequency?
Photo electric effect: It is defined as the emission of electrons when light is shone onto a material. Electrons emitted in this manner are called photo-electrons. Photo electric effect on the basis of quantum theory: (i) Electrons can only absorb or emit energy in discrete amounts called quanta (packets).
What is photoelectric effect derive Einstein’s photo electric equation?
hv=W+21mvmax2….( 2) This equation is known as Einstein's photoelectric equation. When the frequency (γ) of the incident radiation is equal to the threshold frequency (γ0) of the metal surface, kinetic energy of the electron is zero.
How do you calculate photoelectric current?
So IA = E/Δt, where E = nhf (n photons of frequency f) Let's say each photon is able to pull out one electron from the plate, so the current i = ne/Δt, where e is the charge of the electron.
What is the longest wavelength of light that will eject electrons from this metal?
The longest wavelength of light that will cause an electron to be emitted from a metal is 520 nm….