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Author Topic: Do photons have colours?  (Read 8219 times)

Offline thedoc

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Do photons have colours?
« on: 07/07/2015 10:50:01 »
A Boothroyd asked the Naked Scientists:
   
 I have been thinking about it......  And i reckon the "back" of a photon "looks like" is color.  Was wondering if?  That could be the answer because it explains much.

What do you think?
« Last Edit: 07/07/2015 10:50:01 by _system »


 

Offline David Cooper

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Re: Do photons have colours?
« Reply #1 on: 07/07/2015 18:29:42 »
That's a fantastic new way of explaining things, so it's a powerful idea which might revolutionise the way we see the universe. The back of a horse looks like is hair too! I don't know what it means, given the grammar failure, but what a great explanation!
 

Offline PmbPhy

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Re: Do photons have colours?
« Reply #2 on: 08/07/2015 02:04:59 »
Quote from: thedoc
A Boothroyd asked the Naked Scientists:
   
 I have been thinking about it......  And i reckon the "back" of a photon "looks like" is color.  Was wondering if?  That could be the answer because it explains much.

What do you think?
No realistic meaning can be assigned to the "back" of a photon. First of all a photon is a point particle and as such the back is the same place as the front. And then there's the fact that one can only view a photon when it impinges on something like a cone (special cells in our eye which detect color) in our eye. When a photon strikes it it does so as it is traveling in the direction from where the photon was to where the eye cell is, i.e. the "front" of the photon if you wish to think of it that way.
 

Offline jccc

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Re: Do photons have colours?
« Reply #3 on: 08/07/2015 03:08:36 »
why is photon beam able to knock out electrons but not able to bend a flame? even the most powerful laser beam?

if photon has no color, why is my green laser has a green beam and makes a green spot on target?
 

Offline evan_au

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Re: Do photons have colours?
« Reply #4 on: 08/07/2015 11:28:29 »
Paraphrased Question: "Could a photon have a colour?".
Paraphrased Answer: Yes.

Each photon striking a prism or a diffraction grating will be deflected by an angle which depends on its wavelength*. If a light detector (like a camera's light-sensitive chip) is placed in the right area, you can tell which colour the photon had by which cell of the light sensor has been struck by the photon, liberating an electron.
 
Since the wavelength is directly related to colour, the photon has a colour.

* In the case of a glass prism, the angle of deflection for infra-red, visible light and ultraviolet photons follows a steady progression.
However, for a diffraction grating, a photon will take one of several possible angles on exiting the grating, so the signal from the light sensor does not absolutely uniquely identify the colour.
 

Offline lightarrow

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Re: Do photons have colours?
« Reply #5 on: 08/07/2015 18:44:06 »
why is photon beam able to knock out electrons but not able to bend a flame? even the most powerful laser beam?
You could have asked a more intelligent question: "can a photon beam bend a flame?" Yes. When a light beam strikes an air (or flame) molecule it does displace it, but I suspect your laser is not powerful enough to see the effect...

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« Last Edit: 08/07/2015 18:46:23 by lightarrow »
 

Offline jccc

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Re: Do photons have colours?
« Reply #6 on: 08/07/2015 18:55:59 »
if you mix red, blue and green photons, what color photons you get?

if you mix white and black photons, what color photons you get?

why?
 

Online chiralSPO

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Re: Do photons have colours?
« Reply #7 on: 09/07/2015 00:42:53 »
If you mix red, blue and green photons, you get a mixture of red, blue and green photons (in vacuum). It is possible to mix (add) photons together where matter is involved (https://en.wikipedia.org/wiki/Sum_frequency_generation_spectroscopy), but that is quite beyond most of the members of this forum (I suspect)

There are no black or white photons.
 

Offline jccc

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Re: Do photons have colours?
« Reply #8 on: 09/07/2015 00:55:03 »
most photons are color less, like radio wave photons, x-rays.

strange thing is photons have no mass, no charge, but they carry em fields.

how does an electron knows what color of photons should emit? what direction? how many? what speed?
 

Offline lightarrow

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Re: Do photons have colours?
« Reply #9 on: 09/07/2015 11:28:43 »
if you mix red, blue and green photons, what color photons you get?
if you mix white and black photons, what color photons you get?
why?
Explain the exact meaning of "mix photons", or your question is meaningless.

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Offline jccc

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Re: Do photons have colours?
« Reply #10 on: 09/07/2015 14:27:00 »
if you mix red, blue and green photons, what color photons you get?
if you mix white and black photons, what color photons you get?
why?
Explain the exact meaning of "mix photons", or your question is meaningless.

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shine different color laser beams on the same spot.
 

Online chiralSPO

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Re: Do photons have colours?
« Reply #11 on: 09/07/2015 15:33:41 »
if you mix red, blue and green photons, what color photons you get?
if you mix white and black photons, what color photons you get?
why?
Explain the exact meaning of "mix photons", or your question is meaningless.

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shine different color laser beams on the same spot.

Unless there is something very special about that spot, this method will only result in a spot that is irradiated with photons of the same colors coming from the lasers (ie nothing interesting)
 

Offline jccc

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Re: Do photons have colours?
« Reply #12 on: 09/07/2015 18:14:35 »
photon, a pocket of energy, a mass less particle travels at c speed, is impossible to exist according to energy conservation law.

photons spread into dark space simply vanished and never return. energy is lost.

logically sounding?
 

Online chiralSPO

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Re: Do photons have colours?
« Reply #13 on: 09/07/2015 19:06:28 »
But the energy is not lost. The photon still exists. If it were ever to run into anything else, it could transfer that energy, but that isn't a requirement. The photon could go forever, never interact with anything, and still have exactly the same amount of energy it started with.
 

Offline jccc

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Re: Do photons have colours?
« Reply #14 on: 09/07/2015 19:41:53 »
so you are suggesting all matters are within a bigger space that has no boundary?

all matters end up gravitation into a hot ball and radiate out photons into space till 0 K and the universe becomes a cold matter ball in infinite space, all energy is missing forever?

or it bounces back bang the matter ball?

is it possible when things go infinity big, they become infinity small?

we had to stand on solid ground, are we sure the size and age of the space yet?

much to think, a small head. help me!

 

Offline jccc

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Re: Do photons have colours?
« Reply #15 on: 09/07/2015 21:02:21 »
i still cannot figure out how photon is emitted.

even if electron really has orbitals and able to move between orbitals, how is the electron's changing momentum transfer into a particle and travel at c?

is photon a pocket of energy condensed into a particle? what kind of energy? momentum? em force? vibration force?

how photon is absorbed? reflected?

use sun light to heat up water, how water atoms eat photons and heat up? electrons eat photons and move to higher orbitals?

or sun light is vibration force that makes water atoms vibrating faster?
 

Offline lightarrow

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Re: Do photons have colours?
« Reply #16 on: 09/07/2015 23:37:54 »
Quote from: jccc link=topic=58323.msg462609#msg462609
shine different color laser beams on the same spot.
If this is what you had in mind, why talking about photons at all?
And however "mixing photons" cannot be what you wrote.

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lightarrow
« Last Edit: 09/07/2015 23:47:17 by lightarrow »
 

Offline lightarrow

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Re: Do photons have colours?
« Reply #17 on: 09/07/2015 23:41:55 »
photon, a pocket of energy, a mass less particle travels at c speed, is impossible to exist according to energy conservation law.
It's the festival of stupid things? At least ask a question, instead of making bull..... statements.
Photon exists (almost) because energy conservation law is true...

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« Last Edit: 09/07/2015 23:50:08 by lightarrow »
 

Offline jeffreyH

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Re: Do photons have colours?
« Reply #18 on: 09/07/2015 23:52:10 »
i still cannot figure out how photon is emitted.

even if electron really has orbitals and able to move between orbitals, how is the electron's changing momentum transfer into a particle and travel at c?

is photon a pocket of energy condensed into a particle? what kind of energy? momentum? em force? vibration force?

how photon is absorbed? reflected?

use sun light to heat up water, how water atoms eat photons and heat up? electrons eat photons and move to higher orbitals?

or sun light is vibration force that makes water atoms vibrating faster?

If particle physics were easy then everyone would know the answers. You are starting from a position of ignorance and hoping to be spoon fed the answers. Even when you get the answers this doesn't satisfy you. Go and read a particle physics text. It'll stop you right in your tracks.

PS Then try group theory.
« Last Edit: 09/07/2015 23:54:07 by jeffreyH »
 

Offline jccc

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Re: Do photons have colours?
« Reply #19 on: 10/07/2015 00:26:57 »
nature is simple, straight forward. follow physics laws, all things work well.

men invented science, science is always correcting, particle physics have many holes.

no 1 can explain how 1 electron and 1 proton make up an atom yet.

can you answer how electron emit photon? in detail and laws?
 

Online chiralSPO

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Re: Do photons have colours?
« Reply #20 on: 10/07/2015 00:39:51 »
Nature is not simple. If it were we wouldn't exist, because we are not simple.

Science is much simpler than nature is. That's what science is about, simplification (approximation) of the extremely complex to the point that it can be understood by mere humans.

Just because YOU don't understand the explanation of a hydrogen atom, doesn't mean WE can't explain it. Can an orangutan claim that evolution is wrong because it doesn't understand?
 

Offline jeffreyH

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Re: Do photons have colours?
« Reply #21 on: 10/07/2015 00:58:00 »
nature is simple, straight forward. follow physics laws, all things work well.

men invented science, science is always correcting, particle physics have many holes.

no 1 can explain how 1 electron and 1 proton make up an atom yet.

can you answer how electron emit photon? in detail and laws?

Until you can understand the tools that science uses you will be repeating yourself endlessly. You also need to understand that these tools model the processes. A model is ultimately an approximation. If you don't understand the models and what they represent you will never make progress. No one knows WHY an electron and proton make up an atom. Just as no one knows why the electron emits a photon. They just do. You are really asking the wrong questions.
 

Offline jccc

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Re: Do photons have colours?
« Reply #22 on: 10/07/2015 01:30:06 »
i know what's going on. i explained in my theories. you just don't understand/accept.

rather say they just do.

any of my ideas has any logic problem? be appreciate you point it put, so we all can learn from you.

 

Online chiralSPO

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Re: Do photons have colours?
« Reply #23 on: 10/07/2015 02:29:43 »
Quote from: jccc link=topic=58323.msg462702#msg462702 date=1436488206

any of my ideas has any logic problem? be appreciate you point it put, so we all can learn from you.
[/quote

Yes your theories have three major flaws that come to mind: One, you assume that very small things (like electrons) act in a manner similar to things that are big (this is not observed to be true, in fact very small things act very different). Two, you assume there is a simple explanation for everything, when many things are in fact extremely complicated. Three, you ignore reams of evidence that have been gathered and verified by thousands of scientists for centuries(for instance, all of the evidence that light is electromagnetic).

Address these flaws in your logic, and you may have more luck with your theories.
 

Offline jccc

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Re: Do photons have colours?
« Reply #24 on: 10/07/2015 02:55:34 »
light is em wave? or photon particle? or both?

why is powerful laser particle beams able to cut metal but not bend flame?

how sunlight heats up water? photons hit water atoms so electrons in water jump to higher orbitals?

if you answer those questions to understandable logic, i'll accept your theory of light.

all scientist can be wrong,  before science able to explain everything in detail perfectly. like how electrons emit photons.
 

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Re: Do photons have colours?
« Reply #24 on: 10/07/2015 02:55:34 »

 

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