intensity vs energy
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intensity vs energy
can some explain this true or false question please with the answer:
An increase in intensity means an increase in energy
An increase in intensity means an increase in energy
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Re: intensity vs energy
I think this is false. An increase in intensity means you increase the number of photons. You do not increase the individual energy of each photon by increasing intensity. To increase the energy of each photon, I believe you would increase frequency.
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Re: intensity vs energy
I believe that when talking about the photoelectric experiment or light, increasing the intensity does increase the overall energy of all the photons combined because it increases the number of photons. However, increasing the intensity of light does not increase the energy of each individual photon, which must be done by increasing frequency or decreasing wavelength. This is because increasing intensity increases the number of photons, but not the energy of each photon.
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Re: intensity vs energy
Hey!
The intensity of light relates to the amount of photons, but does not have an impact on the overall energy. Like what Tessa said, the photoelectric effect showed how intensity had no effect on the ejection of electrons, but rather the frequency did. Depending on what electrons we are trying to eject (ie what metal surface) this frequency varies, but it must reach this frequency threshold in order to eject any electrons. This shows how energy is related to frequency and wavelength rather than intensity of light. Hope that helped!
The intensity of light relates to the amount of photons, but does not have an impact on the overall energy. Like what Tessa said, the photoelectric effect showed how intensity had no effect on the ejection of electrons, but rather the frequency did. Depending on what electrons we are trying to eject (ie what metal surface) this frequency varies, but it must reach this frequency threshold in order to eject any electrons. This shows how energy is related to frequency and wavelength rather than intensity of light. Hope that helped!
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Re: intensity vs energy
Like everyone said, this is false. I was confused about this too, but from what I gathered, a higher intensity doesn't increase the energy, it just increases the number of photons. The photoelectric effects states that if the energy of the photon is greater or equal to the energy to remove an electron, then an increase in light intensity will result in more ejected electrons. I hope this helps!
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Re: intensity vs energy
I believe it is false as an increase in frequency means an increase in energy.
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Re: intensity vs energy
This statement is FALSE. An increase in intensity will lead to an increase in the number of photons emitted and therefore an increase in the number of electrons affected(1 photon: 1 electron). But the number of electrons affected will not contribute to the total amount of energy, as frequency is the way to increase ENERGY PER PHOTON and get the electrons to actually jump to other energy levels:)
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Re: intensity vs energy
I believe this is false. An increase in intensity would increase the number of particles at a time. An increase in energy has to do with an increase in frequency.
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Re: intensity vs energy
This statement is False. The way I determined this is through the E=hv equation. An increase in intensity does not increase the energy of the photon as it does not change the constant h or increase the the value of v.
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Re: intensity vs energy
It would be false because each photon/electron has a certain amount of energy, increasing the intensity just means that you are increasing the number of photons which increases the number of electrons with the same amount of energy.
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Re: intensity vs energy
I went to a UA session about this, and the statement technically depends on whether light is acting like a wave or a particle. If light is acting like a particle, increasing intensity increases the amplitude of the wave, so it would increase energy. If light is acting like a wave, increasing intensity just increases the number of photons and not the energy.
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Re: intensity vs energy
If we are thinking of light in photons, the light is quantized. This means that each photon has a discrete amount of energy. Increasing the intensity means that there is a greater number of photons, but the energy of each photon remains the same. The answer to that question, then, would be false.
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Re: intensity vs energy
An increase in intensity is an increase in particles, while an increase in energy is an increase in frequency. Think of it as more intense = throwing more balls at a target.
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Re: intensity vs energy
An increase in intensity does not relate to an increase in energy of a photon. Intensity only relates to the number of photons, not the energy each photon has. It is the frequency of a photon that determines its energy.
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Re: intensity vs energy
As many have already discussed, this statement is decidedly false. When we go to the quantum level, the level of one photon, the energy will not increase. This is because increasing intensity increases the number of photons of light, rather than the individual energy of each photon. More photons does not translate to more energy per photon as Dr. Lavelle discussed in lecture.
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Re: intensity vs energy
The statement is false as an increase in intensity is not associated to an increase in the energy of a photon. By increasing intensity, the only thing changing is the number of photons of light and not the energy of each individual photon. In order to increase the energy of a photon one would have to increase the frequency of the light.
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Re: intensity vs energy
This statement should be false. An increase in intensity implies an increase in the overall amount of photons present, not directly affecting the individual energy that each photon possesses. In order to increase the individual energy levels, you would need to alter the frequency.
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Re: intensity vs energy
Hi, personally I think this statement is false as it doesn’t take into account the different views on light. On the quantum view, increasing the intensity does not increase the energy of the individual protons (you’d have to increase frequency in order to do that)
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Re: intensity vs energy
The intensity of light is dependent on the amount of photons. However the intensity does not determine on the overall energy.
The photoelectric effect shows that frquency has effect on the ejection of electrons.
The photoelectric effect shows that frquency has effect on the ejection of electrons.
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Re: intensity vs energy
The answer is false. Intensity and energy do not have a relationship, and they are therefore not directly proportional to one another. Energy and frequency are related, however.
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Re: intensity vs energy
The answer is false because increasing intensity increases the number of photons. Energy only increases when frequency increases.
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Re: intensity vs energy
The answer is false because you have to increase the frequency in order to increase the energy of the photons. Increasing the intensity means that the number of photons that are emitted is increase.
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Re: intensity vs energy
it should be false because intensity is based on how many photons there are, while energy is focused on the individual photon!
Re: intensity vs energy
I believe this statement is false because when light acts as a wave, intensity has nothing to do with the actual energy, only the number of photons involved. (Think about E=hv, v has nothing to do with the number of photons, just the frequency of the photons.)
Re: intensity vs energy
I agree with everyone else. An increase in energy results in an increase in frequency, not necessarily intensity which I believe concerns the amount of photons.
Re: intensity vs energy
Energy and frequency are directly related while energy and intensity are not related as intensity only deals with the number of photos so it is a false statement.
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Re: intensity vs energy
This should be false, because on the quantum level an increase in intensity means an increase in the number of photons, while an increase in energy increases the actual energy of each photon itself. Hope this helps!
Re: intensity vs energy
hi! I believe an increase in intensity increases the number of photons by terms of the photoelectric effect and will emit more electrons but it doesn't effect the energy.
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