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What is the effect of frequency of incident light on photoelectric current?
Wiki User
∙ 12y ago
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.
Wiki User
∙ 12y ago
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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.
What will be the effect on photoelectric experiment if you double the frequency of incident light?
Provided the frequency is more than the threshold frequency, as we double the frequency the photo electric current increases but not doubled. This is because of the increase in kinetic energy of the photoelectrons. More KE means it moves faster, so in one second more electrons would fall on the plate and as current is rate of flow of charge the current would increase a little bit. But usually most of us would ignore this and say that there won't be any change in current. Such a controversial question has been asked in the public exam.
Can photoelectric effect be observed for all metals under same condition of incident light?
no , it cannot be observed in same conditions of incident light because, the threshold energy will be different for different metals.so in that particular threshold energy only the photoelectric effect for that metal can be observed.....
How does photoelectric effect take place below threshold frequency?
It doesn't, and that's the whole big mysterious fact about the photoelectric effect that was standing Physics on its ear about 100 years ago. It doesn't matter how bright the light is, there's no photoelectric effect if the light is below the threshold frequency. And if it's above the threshold frequency, it doesn't matter how dim the light is, those electrons come streaming off of the surface of the target.
What is threshold frequency in photoelectric effect?
It's the frequency at which each photon has the amount of energy required to separate an electron from an atom in the target substance.
Effect of intensity?
The photoelectric current is directly proportional to intensity.It also depends upon frequency, but frequency more than "THRESHOLD FREQUENCY" does not effect the current.The no. of electrons emitted per second by a photo-sensitive surface is directly proportional to the intensity of the incident radiations.So,the photoelectric current depends upon the intensity of the incident radiations.
In the Photoelectric effect after the threshold frequency what effect does the increased frequency have on the photocurrent If you assume the Intensity of the source to be constant?
The increased frequency increases the kinetic energy of the single electron ejected. Remember that the incident light releases a single electron when the threashod frequency is reached
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.
If the frequency of light is greater than the threshold frequency will photoelectric effect starts?
Yes - that's how it works.
What is the emission of electrons from a metals surface when light of a certain frequency shines on it?
photoelectric effect
What does the slope of the graph of photoelectric current versus intensity signify in the photoelectric effect?
The current rises as does the intensity of light detected. The more light the greater the intensity, and the greater the current. The answer to the question is that photoelectric current displayed on a graph is shown as a slope that varies with the intensity of light. Someimes it can go up, sometimes it can go down.The ultimate answer is that the photoelectric effect is unreliable, but it is improving!
What will be the effect on photoelectric experiment if you double the frequency of incident light?
Provided the frequency is more than the threshold frequency, as we double the frequency the photo electric current increases but not doubled. This is because of the increase in kinetic energy of the photoelectrons. More KE means it moves faster, so in one second more electrons would fall on the plate and as current is rate of flow of charge the current would increase a little bit. But usually most of us would ignore this and say that there won't be any change in current. Such a controversial question has been asked in the public exam.
Can photoelectric effect be observed for all metals under same condition of incident light?
no , it cannot be observed in same conditions of incident light because, the threshold energy will be different for different metals.so in that particular threshold energy only the photoelectric effect for that metal can be observed.....
How does photoelectric effect take place below threshold frequency?
It doesn't, and that's the whole big mysterious fact about the photoelectric effect that was standing Physics on its ear about 100 years ago. It doesn't matter how bright the light is, there's no photoelectric effect if the light is below the threshold frequency. And if it's above the threshold frequency, it doesn't matter how dim the light is, those electrons come streaming off of the surface of the target.
What is threshold frequency in photoelectric effect?
It's the frequency at which each photon has the amount of energy required to separate an electron from an atom in the target substance.
In the phenomenon known as the Doppler Effect electrons are ejected when light shines on certain substances?
The Doppler Effect is the change in the frequency of the sound you hear when a car sounding its horn passes you.When the electrons at the surface of an object absorb incident light sufficient for them to escape the surface this is known as the photoelectric effect.
In the phenomenon known as the Doppler Effect electrons are ejected when light shines on the certain substances?
The Doppler Effect is the change in the frequency of the sound you hear when a car sounding its horn passes you.When the electrons at the surface of an object absorb incident light sufficient for them to escape the surface this is known as the photoelectric effect.
