Photoelectric current Definition and 11 Threads

Background: self-studying. Very confused. Here are some initial questions I have about the photoelectric experiment. Some more may pop up later. 1. The book says we know photons exist due to energy considerations (such as emission or absorption). They also say that this photon energy is...

Homework Statement Homework EquationsThe Attempt at a Solution The photoelectric current is directly proportional to the intensity of the light falling on it . It will not depend on the focal length of the lens . When the lens of half the diameter is used , intensity is halved . This...

Hi, I was wondering about saturation current in the photoelectric effect. It is clear to me that for a sufficiently large accelerating potential all of the electrons are gathered by the collecting electrode. Since it is all of them, there cannot be more, and the current won't change if the...

How can explain the difference of these red dots? Red line = Green line ?. How to explain it?

Hi, I have a couple of questions on photoelectrons. When a photoelectron of about 3-eV (varies) interacts within 0.2-um depletion region of silicon, what happens? I know, it will generate an electron-hole pair with an efficiency of 1 for 3.6-eV photoelectron. But what happens if the...

In my book it is stated.When you keep the intensity constant and decrease the wavelength the photoelectric current decreases but I can't understand why? I thought it would stay the same since photoelectric current depends on the intensity of photons as more number oh photons means more e- released

Hi, how could i calculate the current I would get from the photoelectric effect, so that the end result would be in amps? If I have a certain lightsource or source of powerful enough em radiation to conduct the photoelectric effect , how could I calculate the intensity needed for given current ...

Hi. The problem is the following: I have 2.5×10^{15} photons inciding every second on a photoelectric cell. Each photon has 2.5eV of energy and the work function of the cell is 2.2eV. I know that the photoelectric conversion efficiency is 20% and I'm asked to find the maximum electric current...

Homework Statement Mmmm... Me and my classmate came across with this problem when studying photoelectric effect... Given a photocell connected to a circuit with a variable resistor (with resistance R) and an ideal ammeter. When a monochromatic light with frequency (f) (f>f0) and intensity...

Hello All, I have a problem that has been troubling me and I have been unable to find an answer on Google. It is said that 1 photon = 1 photoelectron ejected, Therefore the photoelectric current produced is directly proportional to the intensity of light used. It is also said that the frequency...

Homework Statement In Lenard's experiment to determine e/m for photoelectrons, he puts forwards this equation mv2/2 = eV, where e is the charge, m is the mass of photoelectron, and V is the potential applied. Why the kinetic energy equation is equated to eV? Thanks in advance Homework...