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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

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mmalik
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Reged: 01/13/12

Loc: USA
Photon Therapy new
      #5702062 - 02/26/13 04:52 PM

For those of us needing photon therapy every so often with the help of devices like CMOS, CCD, Retina, etc., let’s talk about our cohort, the Photon. Those with terminal affliction need this therapy lifelong, while some stay in remission for varying periods of time but are predisposed to recurrence, needing this therapy later in life.


Photon is an elementary particle that exhibits both wave-like and particle-like properties [described as quantum mechanics] and is represented in one of the following three ways on paper:




In the grand scheme of things, it is basically a boson (one of two classes of elementary particles, the other being fermions).




Let’s look at one specific example where a photon is released.


Example: When a hydrogen electron falls from its third to second lowest energy level it gives off a photon with a wavelength of 656nm (nanometers), which we refer to as H-alpha, and try to capture with our modified sensors since our retina is not so sensitive to H-alpha frequency photons (nebulae being a major source). Note: Visible light has photons with frequency in the range of about 380nm to about 740nm.




In above example, delta energy (E) being released is a photon (hv) with a frequency (v) of 656nm with a Planck’s constant (h).


Let's keep the talk going with your insights into this little particle or no particle. Thx


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bluedandelion
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Reged: 08/17/07

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Re: Photon Therapy [Re: mmalik]
      #5713778 - 03/05/13 02:13 AM

A wave and a particle
Were walking side by side
One said to the other
Which one of us am I?

- From Einstein the Genius, Album: Tasting the Salty Air, by Shanghaied on the Willamette
http://www.shanghaied.biz/tasting_the_salt_air.htm


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mmalik
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Re: Photon Therapy new [Re: bluedandelion]
      #6319827 - 01/18/14 03:26 AM

Quote:

A wave and a particle
Were walking side by side
One said to the other
Which one of us am I?




Talking of wave-particle duality, there are striking similarities between Planck’s linking of energy (E) and frequency (f) of electromagnetic wave, i.e., E=hf, as quantization of energy (in the form of a particle—photon), and Einstein’s linking of energy (E) and mass (m) of an object, i.e., E=mc˛, as mass-energy equivalence, where ‘h’ is Planck’s constant and ‘c’ is speed of light constant, respectively.


In our case, i.e., astrophotography, light-matter interaction is an effect where electrons are emitted from matter, i.e., atoms when they absorb energy from light, i.e., photons.




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m1618
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Reged: 09/18/12

Loc: Orange County - CA
Re: Photon Therapy new [Re: mmalik]
      #6320122 - 01/18/14 10:10 AM

Stumped.

How about that "0" point. Null?
That point where delta -> undefined v.
Duality and Conservation of energy in general.

These Physical Constants existing instantly from going from absence to presence. Delta of darkness to light.

A beautiful boson indeed... and these eyeballs we have to capture as many as we can with our retina (via CMOS,CCD,glass...) all measured in mm and inches.


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scodavis
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Reged: 01/18/12

Re: Photon Therapy new [Re: m1618]
      #6325249 - 01/20/14 11:08 PM

Photons and bosons and quarks, oh my!

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mmalik
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Reged: 01/13/12

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Re: Photon Therapy new [Re: scodavis]
      #6515219 - 05/09/14 04:14 AM

Photons come in different wavelengths, or colors. A look at photons pertient to astrophotography; in order...


Ultraviolet (UV)........................10 nm - 400 nm (nanometers) "Invisible"
Hydrogen-beta (H-beta)............486.1 nm
Oxygen-III (OIII)......................500.7 nm
Hydrogen-alpha (H-alpha).........656.3 nm
Nitrogen-II................................658.4 nm
Sulfur-II....................................672.4 nm
Infrared (IR).............................700 nm - 1 mm "Invisible"




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mmalik
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Re: Photon Therapy new [Re: mmalik]
      #6518019 - 05/10/14 04:38 PM Attachment (2 downloads)

Following photon types fall within visible spectrum:


Hydrogen-beta (H-beta)............486.1 nm Visible
Oxygen-III (O-III)....................500.7 nm Visible
Hydrogen-alpha (H-alpha).........656.3 nm Visible
Nitrogen-II (N-II).....................658.4 nm Visible
Sulfur-II (S-II)..........................672.4 nm Visible


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mmalik
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Re: Photon Therapy new [Re: mmalik]
      #6518720 - 05/11/14 04:02 AM

All photons of the visible spectrum:


Violet..........380–450 nm
Blue............450–495 nm [H-beta: 486.1 nm]
Green..........495–570 nm [O-III: 500.7 nm]
Yellow.........570–590 nm
Orange........590–620 nm
Red.............620–750 nm [H-alpha: 656.3 nm, N-II: 658.4 nm, S-II: 672.4 nm]


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mmalik
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Re: Photon Therapy new [Re: mmalik]
      #6518723 - 05/11/14 04:16 AM

All photons of light:


Gamma ray.........<0.02 nm
X-ray..................0.01 nm – 10 nm
Ultraviolet...........10 nm – 400 nm
Visible..............390 nm – 750 nm
Infrared..............750 nm – 1 mm
Microwave...........1 mm – 1 meter
Radio..................1 m – 100,000 km


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