Is there any relation between wavelength and brightness?

In summary: I used the "middle gray" of the smoke and compared it to the other colors of the rainbow to determine how many bits the digitizer was using for color resolution. In summary, The brightness of a color is determined by the sensitivity of the optical equipment used to measure it, as well as the colors and context surrounding it. Brightness is subjective and can vary depending on individual perception. Intensity is the amount of energy passing through a specified area in a specified amount of time and can be affected by frequency and the number of photons. However, brightness is not directly proportional to the number of photons. Instead, it is influenced by the way our eyes perceive color and the technology used to capture and display it.
  • #106
sophiecentaur said:
There is a 2:1 ratio of energies of the shortest and longest wavelength photons.

It's all the same to me. If they can measure it, I can simulate it.


It is hardly worth my writing all this again - it's all in earlier posts - but you will surely appreciate the difference between what you get when you count photons and what you get when you measure the energy, for different coloured stars. The accepted way of doing this will take away this problem.

I only see problems and limits if I don't convert energy to individual photons.


Star Magnitude is based on energy flow, so why not just join the club?

Energy flow is based on number of photons flow.


There is no more to be said, really. If you want your simulation to be as real as possible then why not just specify things more conventionally?

To simulate radial spreading of light rays, to be able to model such property as is time interval between arrival of two successive photons, and so I can count photons per pixel.


As I have also said before - the actual code would be hardly any different and you would have learned something at the same time.

Photon is more specific way to model light, energy is vague and ambiguous.
 
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  • #107
sophiecentaur said:
Yes. Laser light is monochromatic but it is so coherent that it can produce speckles and patterns that 'ordinary' light sources do not.

Simulating double slit experiment is on my to do list. The goal will be to explore if there is any other, less magical, mechanics that can produce interference pattern.
 
  • #108
tris_d said:
Photon is more specific way to model light, energy is vague and ambiguous.
Not so: energy is a well-defined core concept in physics. Photons only risks being an incomplete model - but it is your model. Have fun.
 
  • #109
Simon Bridge said:
Not so: energy is a well-defined core concept in physics. Photons only risks being an incomplete model - but it is your model. Have fun.

It's like fluid dynamics, by simulating individual molecules you can get energy, distribution, flow, pressure and what not, but not the other way around. How can photons risk to give incomplete model?

I've read somewhere that measuring distance to some distant galaxies practically boils down to counting photons, where the gap in time interval between two successive photons becomes greater the further galaxy is. How could you model that without modeling individual photons, how could you model that with energy?
 
  • #110
tris_d said:
It's like fluid dynamics, by simulating individual molecules you can get energy, distribution, flow, pressure and what not, but not the other way around. How can photons risk to give incomplete model?

But how do they give a complete model? I think that you don't know enough about photons to make statements and inferences like that? You need to remember that the photon and wave models are complementary. Neither is 'real'. Somewhere in your head, you are visualising them like little bullets. That explains why you think they can explain everything. But they are not like bullets.
Your simulation will give 'an' answer and it will be good fun to develop. How relevant or accurate it is will depend upon how valid your assumptions are. It is important for the tail (simulation) not to try to wag the dog (actuality).

btw, what sort of simulation can deal, individually, with enough molecules to give an answer in the fluid mechanics of a turbine? I have not come across anything as complex as that. I thought that most treatments were statistical and macroscopic. IS there a reference?
 
  • #111
sophiecentaur said:
But how do they give a complete model?

What are you referring to, interference? Is that relevant when taking photos of the stars? Can you simulate interference pattern with energy?


I think that you don't know enough about photons to make statements and inferences like that?

I think you are talking about ME, again, it's off topic and unnecessary. What are you doing here, what is this to you, some vanity contest? Ok, I know more about photons than you or anyone else, how about that?


You need to remember that the photon and wave models are complementary. Neither is 'real'. Somewhere in your head, you are visualising them like little bullets. That explains why you think they can explain everything. But they are not like bullets.

And? You forgot to mention what is your point. The result of the simulation is an IMAGE. That is what defines how the simulation should be handled. When you shoot individual photons they produce discrete individual 'dots' when they hit a detector, and that's what is important here. It's as real as you can get.


Your simulation will give 'an' answer and it will be good fun to develop. How relevant or accurate it is will depend upon how valid your assumptions are. It is important for the tail (simulation) not to try to wag the dog (actuality).

There are no assumptions, relation between compound energy of some amount of light and the number of photons is defined by the energy of individual photons. The result will be valid and accurate as much as actual measurement are.

a.) can you simulate radial spreading of light rays with energy?

b.) can you simulate time interval between arrival of two successive photons with energy?


btw, what sort of simulation can deal, individually, with enough molecules to give an answer in the fluid mechanics of a turbine? I have not come across anything as complex as that. I thought that most treatments were statistical and macroscopic. IS there a reference?

I could make such program, it would just take a long time to compute. Fortunately however photons are much easier to simulate as they do not interact with each other, not in the way that would be relevant for this simulation anyway. -- Don't you have anything better to do? Why do you even care? Did photons kill your dog when you were kid, or something, why do you hate them so much?
 
  • #112
How can you ask whether interference (diffraction?) is relevant when observing the stars. What Astronomer can ignore diffraction? Why do they all want bigger telescopes? What do you think the Airy Disc is all about? Are you aware that the diameter of the Airy disc varies with wavelength? You are seriously trivialising the Physics involved in the system you are claiming to simulate. It is making a pretty big assumption that a given photon will hit a given pixel - that's what diffraction is all about. Does your simulation do more than to take a basic ray model and then assume that photons are traveling along these rays?

I think you could find writing a valid simulation of fluid molecules could be harder than you think.
 
<h2>1. What is the relationship between wavelength and brightness?</h2><p>The relationship between wavelength and brightness is known as Wien's displacement law. It states that the peak wavelength of radiation emitted by an object is inversely proportional to its temperature. This means that as the wavelength decreases, the brightness increases.</p><h2>2. Why does the brightness increase as the wavelength decreases?</h2><p>This is because shorter wavelengths have higher energy levels, which means they carry more energy. As a result, when an object emits radiation at shorter wavelengths, it appears brighter to us.</p><h2>3. Is there a specific wavelength that is the brightest?</h2><p>Yes, the peak wavelength of an object is the brightest. This is known as the peak emission wavelength and it can be calculated using Wien's displacement law.</p><h2>4. Can the relationship between wavelength and brightness be seen in everyday life?</h2><p>Yes, the relationship between wavelength and brightness can be seen in everyday life. For example, the sun appears brightest at shorter wavelengths, such as blue and violet, while objects like fire emit radiation at longer wavelengths, appearing less bright to us.</p><h2>5. How does the relationship between wavelength and brightness relate to the color of light?</h2><p>The color of light is determined by its wavelength. As mentioned before, shorter wavelengths appear bluer and brighter, while longer wavelengths appear redder and less bright. This is why objects with higher temperatures, such as the sun, emit bluer and brighter light, while cooler objects emit redder and less bright light.</p>

1. What is the relationship between wavelength and brightness?

The relationship between wavelength and brightness is known as Wien's displacement law. It states that the peak wavelength of radiation emitted by an object is inversely proportional to its temperature. This means that as the wavelength decreases, the brightness increases.

2. Why does the brightness increase as the wavelength decreases?

This is because shorter wavelengths have higher energy levels, which means they carry more energy. As a result, when an object emits radiation at shorter wavelengths, it appears brighter to us.

3. Is there a specific wavelength that is the brightest?

Yes, the peak wavelength of an object is the brightest. This is known as the peak emission wavelength and it can be calculated using Wien's displacement law.

4. Can the relationship between wavelength and brightness be seen in everyday life?

Yes, the relationship between wavelength and brightness can be seen in everyday life. For example, the sun appears brightest at shorter wavelengths, such as blue and violet, while objects like fire emit radiation at longer wavelengths, appearing less bright to us.

5. How does the relationship between wavelength and brightness relate to the color of light?

The color of light is determined by its wavelength. As mentioned before, shorter wavelengths appear bluer and brighter, while longer wavelengths appear redder and less bright. This is why objects with higher temperatures, such as the sun, emit bluer and brighter light, while cooler objects emit redder and less bright light.

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