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When light over a cretain frequency hits a conducting metal with lots of delocalised electrons, it transfers a lot of energy, and after a while it will start emmitting electrons. The only condition is f>fo (i.e the frequency is bigger than the minimum frequency). The minimum frequency is about 540nm- about green visible light. The rate of emmission can be changed with a circuit with an anode and a cathode on either end of the photoelectrisising metal.
The effect can be demonstrated with a Gold Leaf electroscope. Before light is shone, the whole electroscope is neutral, and the gold leaf is stationary. When the electroscope loses electrons in from photoectrisisng the gold leaf is repelled as they now have opposite charge.
The effect has many uses, including solar power.
What else can I help you with?
Why potassium and caesium is rather than lithium are used in photoelectric effect?
Potassium and caesium are more commonly used in photoelectric effect experiments compared to lithium because they have lower work functions, making it easier to release electrons when light is shone on them. This results in a more pronounced and easily measurable photoelectric effect. Additionally, potassium and caesium have larger atomic sizes, which means their electrons are further away from the nucleus, facilitating the ejection of electrons in the photoelectric effect.
Will indium display the photoelectric effect with UV light?
Yes, indium can display the photoelectric effect when exposed to UV light. When UV light shines on a metal surface like indium, electrons are ejected from the surface due to the photon energy exceeding the work function of the metal. This phenomenon is known as the photoelectric effect.
Why does the color of the light source determine whether the photoelectric effect will occur?
it doesn't matter how bright the light is in order to break free the electrons from the substrate but the kind of colour used is very important.This is because electron will start to move when light is up close to the blue end of the spectrum.
What is the relationship between the kinetic energy of ejected electrons and the intensity of incident light in the photoelectric effect?
In the photoelectric effect, the kinetic energy of ejected electrons is directly proportional to the intensity of the incident light. This means that higher intensity light results in higher kinetic energy of the ejected electrons.
Why did Albert Einstein win the noble prize in chemistry?
Albert Einstein did not win the Nobel Prize in Chemistry. He won the Nobel Prize in Physics in 1921 for his explanation of the photoelectric effect, which laid the foundation for the development of quantum theory.
Match the experimental conditions applied to the photoelectric effect observed.?
conditions of photoelectric effect
What percents of xrays are produced in a photoelectric effect?
The amount of xrays produced in a photoelectric effect varies. . . . alot.
Which phenomenon demonstrates a particle nature of light?
The photoelectric effect demonstrates the particle nature of light. In this phenomenon, light is shown to behave like a stream of particles (photons) by ejecting electrons from a material when it hits the surface.
Can photoelectric effect done in vaccum?
Certainly, of course, and you betcha. The presence of air has no function or involvement in the photoelectric effect.
Is reverse process of photoelectric effect is zeeman effect?
No, the reverse process of the photoelectric effect is not the Zeeman effect. The Zeeman effect is the splitting of spectral lines in the presence of a magnetic field, while the photoelectric effect is the emission of electrons from a material when exposed to light. They are two distinct phenomena in physics.
What is Einstein photoelectric effect?
Einstein's photoelectric effect work found that the incident light involved in the photoelectric effect was made of individual quanta (photons) that interacted with the metal's electrons like discrete particles, not waves.
Do radio and microwaves produce photoelectric effect?
No, radio waves and microwaves do not produce the photoelectric effect. The photoelectric effect is the phenomenon where electrons are emitted from a material when it is exposed to light of sufficient frequency (typically ultraviolet or higher). Radio waves and microwaves have lower frequencies and energies than light, so they are not capable of causing the photoelectric effect.
What is it called when sunlight excites an electron?
The physics term we generally apply is photoelectric effect. Back in the day (and none of those guys are still around), it might have been called the photovoltaic effect. You need a link, and we've got one for ya. It's to Wikipedia's post on this topic.
What was Albert Einstein's contribution to our understanding of the photoelectric?
he described light as little packets called photons
The emission of electrons from metal caused by light striking the metal is called?
Photoelectric effect.===================================== This phenomenon was discovered by Albert Einstein, for which he received the Nobel Prize for Physics. The solar cells that we use today is a direct application of the photoelectric effect, as the special metal absorbs Sun's photons and gives off electron (and the flow of electrons generates an electric current).
What type of energy uses the photoelectric effect?
Solar energy uses the photoelectric effect to convert light energy into electrical energy. When sunlight shines on a solar panel, the photoelectric effect causes electrons to be released, creating an electric current.
What does light produce in a photoelectric effect?
In the photoelectric effect, light produces electrons when it strikes a material surface. The energy of the incident light is transferred to the electrons, causing them to be ejected from the material.
