What is light ? (Atomic Physics Video Series – Part 2) by muphy

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science · @muphy · Nov 15 '17

$26.83

What is light ? (Atomic Physics Video Series – Part 2)

<html>
<p>Light… &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;What is it? &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;What is it made of?<br>
How does it interact with atoms?<br>
</p>
<p><img src="https://s26.postimg.org/vo43l8t55/Ep02_Whatis_Light.jpg" width="1188" height="668"/></p>
<p><a href="https://steemit.com/science/@muphy/the-energy-of-an-atom-atomic-physics-video-series-part-1">The first video of this series</a> discussed the energy of an atom within the scope of the model defined by Niels Bohr. This model describes an atom as being a central nucleus with electrons in circular orbit around it.&nbsp;</p>
<p>In this video, we came to realize that when we talk about the energy of an atom, we are actually discussing the energy of its electrons. We will prove in detail in episode 4 that for a hydrogen atom (1 electron in orbit around a nucleus made of a single proton), the radius of the electron’s orbit is directly linked to the energy of the atom. Change the orbit of the electron, and the energy of the atom changes accordingly.</p>
<p>But how can this be done? How can one change the energy of an atom?</p>
<p><img src="https://s26.postimg.org/t82a7eb2h/Frieze_Bulbs.jpg" width="1280" height="158"/></p><br>
<p>Well, this can be done with light. Light is a carrier of energy. We will see in episode 3 that if the energy carried corresponds exactly to the energy required to move an electron from an orbit to the other, the light will get absorbed by the atom!&nbsp;</p>
<p>It goes both ways: an atom can emit light carrying the exact amount of energy released when an electron moves back from an orbit of high energy to an orbit of low energy.</p>
<p>But before we go in detail about that, it is important to know what light is actually made of:<br>
Is it a wave? Is it a particle?<br>
<br>
Click the video below and get the answer!</p>
<p>Enjoy the ride!</p>
<p>https://youtu.be/XwNsi1vzjTs</p>
<p><img src="https://s26.postimg.org/pqv4dth55/Frise_02.jpg" width="1280" height="103"/></p>
<p>This video series aims at providing an introduction to the quantum world to non-scientists and high school students preparing for their high school exams.&nbsp;</p>
<p>If you wish to deepen your understanding, please explore @lemouth 's quantum mechanics series. A relevant chapter to this specific video is <a href="https://steemit.com/science/@lemouth/quantum-mechanics-lessons-on-steemit-7-quantization-of-the-electromagnetic-radiation-and-the-birth-of-the-photon">Quantization of the electromagnetic radiation and the birth of the photons</a>.</p>
<p><em>Credits: Friezes and the main illustration are based on illustrations found on Pixabay.<br>
</em></p>
<p><img src="https://s26.postimg.org/pqv4dth55/Frise_02.jpg" width="1280" height="103"/></p>
<p><em><strong>Hi,<br>
I’m @muphy,<br>
My life revolves around music production, teaching sciences, and discovery through travel.<br>
You enjoyed that post? &nbsp;&nbsp;&nbsp;Resteem and Upvote!<br>
You are interested in these topics? &nbsp;&nbsp;&nbsp;Follow me!</strong></em></p>
</html>

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@builderofcastles · Nov 15 '17

Trying to explain light without understanding and explaining the aether is a futile task.  As a result, the current "scientific" explanation of light doesn't do a very good job of explaining the phenomena we see light do.

Like, the double slit experiment.  Where, a single photon will go through both slits and interfere with itself.  Or, if there is an observer, (at any time, past or future) the photon will only go through one slit.

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@justtryme90 · Nov 15 '17

Nonsense as usual I see.

👍 muphy

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@builderofcastles · Nov 16 '17

Yep, materialistic science is nonsense.  It has been disproven way too many times, but it it is still staunchly supported by all those college professors.

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3 replies

@lemouth · Dec 4 '17

$1.27

Finally, I took the time to watch this video. This was on the to-do list... Sorry for the delay.  I guess you know how it works with free time :p

This video is actually perfect for the class of students it targets. It is extremely well done, I must say. Very visual (we can say that, cf. the topic :p) and very understandable for students.

I have one (super minor) remark (that you may actually want to ignore). Strictly speaking, the concept of photons was proposed by Einstein to explain the photoelectric effect and proved by Compton who demonstrated the 'particle' behavior of photons. Starting from the Compton experiment in 1923, the concept of photons was finally fully accepted by the scientific community. And the name photon itself was invented by Lewis in 1926. 

PS: we say a quantum of energy, don't we, not a quanta? :D

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@muphy · Dec 5 '17

You are right, 1 quantum, 2 quanta, I need to brush up on my Latin, lol!  

When I was recording  "What is Light", the train of thoughts was written down (i.e. the scenario) but not the text details, (I was kind of improvising): And I remember a little uneasy feeling when saying: He (Einstein) called them photons. I should of said something more like, "later, these were called photons..."  During edition, I thought of making a text box correcting this as I do when I say a mistake and discover it later... Yet, it would have just added unnecessary heaviness to the message in the video... so left it that way... 

Thank you for your great remark, I didn't really know who invented the term "photon", now I do :-)!

And thank you for watching these videos. It's so cool to get some feedback from an active researcher in this field.

By the way, do you actually carry out research at the LHC? If so, I want to come and visit one day! 
(I used to carry out some of my experiments in High Pressure High Temperature X-Ray crystallography at the ESRF synchrotron when I was in academia, and I loved to have these huge multi-billion dollar machines at the service of my fingertips :-) )

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@lemouth · Dec 5 '17

> By the way, do you actually carry out research at the LHC? If so, I want to come and visit one day!

I am a theorist, so that strictly speaking, I am not running the machine. But the LHC results are used in my every-day research, I am part of the CMS collaboration (as a theorist), and I am (kind of) regularly going to CERN. For the visit, the best chance may be 2019. The machine will be shut down for upgrades, and there will be ways to go down in there and see the detectors.

> (I used to carry out some of my experiments in High Pressure High Temperature X-Ray crystallography at the ESRF synchrotron when I was in academia, and I loved to have these huge multi-billion dollar machines at the service of my fingertips :-) )

Grenoble! This is where I did my PhD (at the LPSC, the former ISN, not too far from the ESRF). When where you there?

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5 replies

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@tanmoykumer · Nov 15 '17

nice

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