Photoelectric Definition and 426 Threads

Alright, let's be real here Electrons are ejected from a metal surface with speeds ranging up to 4.71×105 m/s when light with a wavelength of lambda = 628 nm is used. What is the work function (in eV) of the surface? Alright, money, using the formula: Max Kinetic energy = hf - Eo where...

I have been recently studying the photoelectric effect and electron emission from metals. I am curious about how (if at all) this could affect the material properties of the metal, like the resistivity or stress/strain.

I'm working on a lab where I used LEDs of different wavelenths to record photocurrent they create when striking a metal. Using this data, i was able to find an equation relating the wavelength of the incident light to the current that is produced. My problem is that when I repeated the...

Photoelectric effect and moving from A to B... When originally reading about the photoelectric, i guess i was looking at the electrons a bit classically yet using the quantum model of the photon, but it did appear to make sense when concerning the work function. I thought that when it was...

Here is a question I am having trouble with :rolleyes: , thanks for your help. Electrons are ejected from a photoelectric surface with a maximum speed of 4.20 * 10^5 m/s. If the work function of this surface is 2.55 eV, what is the wavelength of the incident light? This is how i tried...

What is the differential cross section for photo-electric effect? Is there a paper that explains this in more detail? Thanks in advance for any responses!

How the Concept of Photoelectric effect proved that the light acts as a particle? Considering the fact that even the electron exist as waves, Can't the superposition of the light waves and the electron waves result in the ejection of the photo electron. Thanking you in advance.

When white light is radiated on a metal surface such as a zinc plate, do any of the zinc atoms emit any electrons? I know that only the high freq photons that are above the threshold freq such as ultra-violet do, but what confuses me now that I am thinking about it is that, of course white...

Light of intensity 2.0 W/ m^2 is incident on an aluminim surface. The wavelength of the light is 160nm. For aluminium the work function is 4.2eV. Find the kinetic energy of the slowest moving electrons So then Kmin would be the wavelength at which the cutoff frequency occurs, yes? e =...

Simple question: What happens to the energy of a photon that does not succeed in knocking off an electron??

The wavelength of visible light is between 400nm and 760nm. We shed a 100W visible light on a piece of metal. In classical electrodynamics, what is the number of electrons escaping from the Lithium surface per second, if the metal absorbs 20% of the light? Lithium has a work function of 2.38eV.

What frequencies of light does photoelectric light react best to? Does it matter? How would it react to an amplified form of cosmic radiation?

What happens when you increase the frequency of the light incident on a metal surface? Does it increase the threshold frequency for the emission of photoelectrons? Does it increase the Kinetic energy of some energetic photoelectrons? I can't figure this out.

Hey people, I'm doing some last minute revision for my physics A-level (not literally last minute, i have a few days till the exam) and I need something clarifying. The photoelectric effect is supposed to demonstrate particle behaviour of light. From what I have read, the energy of the...

it state electron will be released from a metal surface if exposed to electromagnetic so i was thinking on a sunny day, a particular metal exposed to sun light one of the emf,, would the electron start to fly off the surface? if it does,? isn't this radiation? or it is...

Photoelectric effect question, help please, thanks! In the standard experiment the stopping voltage is measured for several wavelengths of incident light. In this apparatus the photocathode is metallic potassium. Suppose that the apparatus has not been used for some time and that its...

when UV light is shone upon a metal, can electrons be ejected from the metal or does this only occur if there is another force in play (eg a potential difference to sweep the elctrons away) also, if electrons (at their base energy level) only accept a specific frequency of UV light (which...

Most physics books says something like this on the photoelectric effect: "the photoelectric effect provided strong evidence of the particle nature of light - and it eventually led Einstein to propose that light consisted of discrete packets of energy (photons) in 1905." I have been told...

In an exam today the teacher asked "What does the photoelectric effect demonstrate" and the answers were "The wave nature of light", "The particle nature of light", "The dual nature of light" (i.e both)" and "Neither". I answered that it demonstrates the dual nature of light, but she insists...

This may seem like a stupid question, but i just can't get my head around it. Basically i was wondering why a mirror refless light. Of course the simple answer suggests that it just reflexs it back (the basic laws of optics). But then i was also thinking about the photoelectric effect and was...

What is the relationship between the maximum electric current and the intensity of incident light? -are the inversely proportional? What colour has the larges cutoff potential? -is it yellow? Is cutoff potential effected for violet light? -no? How do you calulate maximum kinetic...

I would like to know why, experimentaly, there is a difference between the maximum photocurrent with a yellow illumination (lambda = 580 nm) and other colors with a lower wavelenght like green or blue, respectively 546 and 404 nm. According to the theory, the max photocurrent does not depend of...

Can any1 explain this process and why it supposedly only works on metals.

Hi, I'm have a problem with photoelectric effect it states that we have a wavelength of 2.08*10^-7 falls on the photosurface, a voltage of 1.40V is required to stop the emitted electrons from reaching the anode. What is the largest wavelength of light which will result in emission of...

Doppler and photoelectric effect When using the doppler effect equations to determine the speed of celestial objects, what happens to the energy of the photons? If a certain device required a 600nm wavelenth of light and frequency 5E14 Hz to induce current, would photons from a celestial body...

how can i use photoelectric effect to do a in class presentation. hoe can i exploit this phenomenan to make something meaningful from physics point of view. please give appropriate suggestions.