Elementary Particle for Heat?

[AFTT47]

Lower frequency waves oscillate more slowly, not travel more slowly. All waves travel at the speed of light.

[ignoramus]

Sometimes, when you look at seaweed underwater, it looks browny/reddy.
It is in fact bluey/greeny when you pull it out.
The light bouncing off it has lost a lot of it energy by the time it penetrates the water to reach your eyes.
The energy is weak by then and are the low frequency type only.

[Meandering Atheist -J-]

Heat in the sense physicists use it is nothing but energy that is randomly distributed in a material or collection of particles. If you have a gas, the heat it contains is just the random motions of all of its molecules.

I like this explanation. Heat usually gets explained as the kinetic energy of all the particles. Although this explanation isn't quite right (I forget what the more sophisticated definition is), it gives pretty good intuition. As you remove particles your gas gets colder... etc.

[ignoramus]

Technically yes. If pressure in a fixed container is causing the heat.
You do not need to remove any particles to transfer or reduce heat. Just change the total energy levels of the existing particles.

[vorlon13]

And what one is doing with the photons can impact the terminology too.

For instance, in a hydrogen bomb, the fission trigger dumps an enormous, and nearly instantaneous blast of x-rays towards the secondary. This blast of x-ray photons heats the materials around the secondary, even though they are not infrared photons and causes an enormous increase in pressure that crushes the secondary and initiates it's thermonuclear reaction.

Radio frequency photons are used in particle accelerators to accelerate particles.

Microwave ovens use radio frequency photons, much weaker than infrared photons to warm up your oatmeal because the microwaves are tuned to a frequency the water molecules absorb and it increases their vibrations, which is friction, and they heat up.

Ultra violet photons can cause florescence in some materials that cause them to emit visible light (frequently of specific colors, although phosphorus makes white) instead of heating the materials.

[ignoramus]

Vorls, anyone, will it ever be possible to create an almost invisible cloak one day?

Conspiracy hat on: Is any bit of the Philadelphia experiment true, you think.

[vorlon13]

Regarding the 'Philadelphia Experiment:

(from wiki) A reunion of Navy veterans who had served aboard the USS Eldridge told a Philadelphia newspaper in April 1999 that their ship had never made port in Philadelphia. Further evidence discounting the Philadelphia Experiment timeline comes from the USS Eldridge’s complete World War II action report, including the remarks section of the 1943 deck log, available on microfilm


My take:
kinda fucks up the myth when the ship involved in the supposed experiment never made it to the location where the experiment was supposedly conducted.

[Alex K]

Heat in the sense physicists use it is nothing but energy that is randomly distributed in a material or collection of particles. If you have a gas, the heat it contains is just the random motions of all of its molecules.

I like this explanation. Heat usually gets explained as the kinetic energy of all the particles. Although this explanation isn't quite right (I forget what the more sophisticated definition is), it gives pretty good intuition. As you remove particles your gas gets colder... etc.

Yes, but the random part is important. If you throw a ball, you would not count the resulting kinetic energy as heat because all atoms have the same direction. But if it hits some obstacles and bounces around till it is at rest, what happened is that this kinetic energy was distributed randomly among the atoms during the inelastic collisions it experienced, and the ball now rests but is warmer.

[Iroscato]

Erm, Iro, I don't know what "transmitting time" would even mean...? Transmitting heat on the other hand seems to have a pretty straightforward meaning.

Physics is hard.

I mean there is no elementary particle that represents heat. Neither is there one for time.

I'm sorry, I shouldn't have started this. Dear God, I'm so sorry! FORGIVE ME.

[IATIA]

Here you go.

Infrared Energy