Which graph represents the Energy of a photon vs intensity?

In summary, the question asks which graph is correct when comparing X (intensity of monochromatic blue light) and Y (energy of each photon). The correct graph is the one with consistent energy in E, as increasing the intensity of light does not increase the energy of the photon but rather the number of photons. However, the photoelectrons are not relevant in this question, making the answer C incorrect. The answer should be E, despite the answer key stating otherwise.
  • #1
YMMMA
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Homework Statement


If X represents the intensity of monochromatic blue light and Y represents the energy of each photon of the light, which one is the correct graph below?

Homework Equations


KE=hƒ-∅, where ∅ is the work function
Energy of a photon= hƒ

The Attempt at a Solution


Increasing the intensity of light does not increase the energy of the photon. However, It does increase the number of photons, which increases the number of ejected electrons (more current). Does that mean the graph is the one with consistent energy in E.
 

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  • #2
Since "Y represents the energy of each photon of the light," the photoelectrons have nothing to do with the question. The answer is indeed E.
 
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  • #3
I don’t know why the answer key says it is C, so I had to check on my understanding.
 

FAQ: Which graph represents the Energy of a photon vs intensity?

1. What is the relationship between the energy of a photon and intensity?

The relationship between the energy of a photon and intensity is direct, meaning that as intensity increases, the energy of the photon also increases. This is because intensity measures the number of photons per unit area, and each individual photon carries a certain amount of energy.

2. How is the energy of a photon typically represented on a graph?

The energy of a photon is typically represented on a graph as the y-axis, with units of joules (J) or electron volts (eV). The x-axis typically represents the intensity, with units of photons per unit area per second (photons/cm2/s).

3. Can the energy of a photon and intensity be plotted on the same graph?

Yes, the energy of a photon and intensity can be plotted on the same graph, with energy on the y-axis and intensity on the x-axis. This allows for a visual representation of the direct relationship between the two variables.

4. What shape does the graph of energy of a photon vs intensity typically have?

The graph of energy of a photon vs intensity typically has a linear shape, with the line increasing from left to right. This reflects the direct relationship between the two variables, where as intensity increases, so does the energy of the photon.

5. How does the energy of a photon vs intensity graph differ for different types of electromagnetic radiation?

The energy of a photon vs intensity graph may differ for different types of electromagnetic radiation, as different types of radiation have different energy levels. For example, the graph for visible light would have a different slope than the graph for x-rays, as x-rays have a higher energy level per photon than visible light. However, the general linear relationship between energy and intensity would still hold true.

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