Einstein's Proof of E=mc² 

"Suppose there's a cat in space.......E=mc²"

The teacher: Any questions? Me: Yeah, what the fck?

Just when I was about to crack the code with the cat he moved on to a freakin' spaceship.

Teacher: How could you not understand, the instructions were clear The instructions:

Literally i thought i was dumb when i didn't understand anything..but now i feel relaxed when any of us understood nothing...

Literally all I understood was light cat and spaceship

Before: hope could understand more After: cat, energy, spaceship

some problems with the derivation: 1) the expression for relativistic doppler effect with v^2 means that there can only be "blue" shift for a light source moving towards the observer or away from the observer. obviously this is not true, 2) one cannot use relativistic doppler expression and combine it with non-relativistic kinetic energy expression where v

Cat is the new SI unit for everything

I’m even more confused now. Never heard of catnetic energy before.

That was surprisingly simple to understand so I assume you did a great job explaining it.

This is beautiful! I love how you do not need to use any calculus, as well as how short it is

I understood this perfectly. After watching it twice. After having done a General relativity course.

*Top 10 scientists Eminem was afraid of :*

めちゃくちゃ分かりやすかったです!! 勉強になりました!!

This was simply amazing. Thank you so much for this. 00:38-1:00 that's where I began to understand the kernel of the idea.

Looks like the cat got out of the box again and is causing all kinds of havoc in the universe.

E=MC2 = Explanation Might Confuse Too

Can someone explain to me how this relates to the regular doppler effect. Like the dominant effect of an object moving away from you is to red shift it, so when we measure the light it should have lost energy instead of gaining it like the video suggests. Also, can we know that KE + energy of the light accounts for all the energy in the system?

I knew it was related to Kinetic Energy because the formulas are closely related. This is a good interpretation. Thank you.

At this time i want to thank 0.25× for supporting me through this video

Where can I found a radioactive floating cat

Title: "Energy, Mass, and Light: An Exploration of Fundamental Concepts" Abstract: This paper explores fundamental concepts related to energy, mass, and the nature of light. It delves into the famous equation E=mc^2 and its implications, discussing the energy-mass equivalence principle. Additionally, it examines the concept of light as both wave and particle, discussing its energy, frequency, and speed. The paper also addresses the idea of photons having mass and explores the relationship between energy, frequency, and mass in the context of light. Introduction: The concept of energy-mass equivalence, as encapsulated by Einstein's equation E=mc^2, is a fundamental principle in modern physics. It states that energy (E) and mass (m) are interchangeable, with the speed of light (c) acting as the conversion factor. This equation has profound implications for our understanding of the universe. Section 1: E=mc^2 E=mc^2 explains the relationship between energy, mass, and the speed of light. Mass can be converted into energy and vice versa. Practical applications and implications include nuclear energy and the mass-defect in chemical reactions. Section 2: The Nature of Light Light exhibits both wave-like and particle-like behaviors. As a wave, light is characterized by its frequency (f) and wavelength (λ). As a particle, light is composed of photons, carrying energy and exhibiting mass-energy equivalence. Section 3: Photons and Mass Photons are associated with a tiny amount of mass due to their energy content. Calculations for the mass of photons yield extremely small values. Section 4: Energy, Frequency, and Mass The relationship between energy, frequency, and mass in the context of light is explored. The equation E=hf (where h is Planck's constant) is discussed in relation to E=mc^2. Key Values and Concepts: Speed of light (c) = 299,792,458 meters per second. Planck's constant (h) = 6.62607015 x 10^-34 Joule seconds (approximately). List of Colors and Corresponding Frequencies: Red Light: Wavelength Range: 620 nm to 750 nm, Frequency Range: 400 THz to 483 THz Orange Light: Wavelength Range: 590 nm to 620 nm, Frequency Range: 483 THz to 508 THz Yellow Light: Wavelength Range: 570 nm to 590 nm, Frequency Range: 508 THz to 526 THz Green Light: Wavelength Range: 495 nm to 570 nm, Frequency Range: 526 THz to 606 THz Blue Light: Wavelength Range: 450 nm to 495 nm, Frequency Range: 606 THz to 668 THz Violet Light: Wavelength Range: 380 nm to 450 nm, Frequency Range: 668 THz to 789 THz Mass of Photons for Each Color (based on energy content): Red Light: Approximately 5.5217 x 10^-36 kilograms Orange Light: Approximately 4.4897 x 10^-36 kilograms Yellow Light: Approximately 3.6565 x 10^-36 kilograms Green Light: Approximately 2.6649 x 10^-36 kilograms Blue Light: Approximately 1.6783 x 10^-36 kilograms Violet Light: Approximately 9.2951 x 10^-37 kilograms Conversion Calculations: Conversion of energy to mass: Using E=mc^2, mass (m) can be calculated by dividing energy (E) by the speed of light squared (c^2). Conversion of mass to energy: Using E=mc^2, energy (E) can be calculated by multiplying mass (m) by the speed of light squared (c^2). Conclusion: This paper has provided an overview of fundamental concepts related to energy, mass, and light, emphasizing the interconnectedness of these concepts. It highlights the significance of E=mc^2 in understanding the conversion of mass into energy and the role of photons in carrying both energy and a minute amount of mass. Further research and exploration in these areas continue to deepen our understanding of the physical world. Please note that this summary includes numerical values and lists of colors, frequencies, and corresponding masses, providing a quantitative aspect to the paper's content.

Thank you!!!!!!! This is a wonderful understandable derivation of E = mc2, since the original one is written in German. Your presentation save a lot of physicist's lives!

You're faster than the speed of light

Okay, not ashamed to say it, but my brain just melted.

Instructions unclear. Cat got sent onto orbit

I just understood now... It took me a lot time and dedication but I finally understood that Einstein loved Cats.

can you talk faster?

Speed of light is nothing when compared to your speed of talking 😐

I was about to drop science class and shift to humanities when I first saw this

Loved this video years ago when I had no clue what was happening and love it now even more rewatching it after a year of engineering thermo

But what if the cat is Schrödinger's cat?

Me dumb. Me not unsderstand. Me watch again.

I feel cat has always been a part of science and physics as a cat is here and Schrödinger's CAT🤣🤣🤣

I finally understood this video after watching it for the fifth time and it was like I reached enlightenment.

2:11 mins of physics about E=MC^2 Observation: cats live in space Conclusion: cats are evolving

I have one question: WHAT?

This guy : "Any questions???" Me (an intellectual) : " Why cat ? Why not dog ??"

So Relative means like, I look at an airplane flying 6 miles above and it looks like it's going slow near the horizon when it's not really? So it's just about looks?

Cat 🐈 cat 🐈 cat 🐈cat cat 🐈 E=mc²

A radioactive cat? It must have 18 half-lives then...

So the KE remains unchanged and Light energy is come from the cat’s mass this I get it but where is c squared come from ? Kinda confuse abt E•(1+v^2/2c^2)how this formula is formed acc to the Doppler effect ?

Oh! Never knew that the M represents the change in mass of the object. Amazing ❤

This guy's equation( rather videos) will forever be remembered as "The Cat equations" In the mean time in heaven- Schrodinger: That's my boy

1:26 "But, this is silly!" No, silly would be me thinking I could somehow comprehend any of this.

Wow! That is a super simple explanation. I remember deriving that equation many years ago when I was in college. I can't remember exactly how I did it but it was way more complicated than this.

where did the factor (1 + V*V/2*C*C) come from? That is the key to everything and it popped out of the air.

My knowledge before watching this vid: 0 My knowledge after watching this vid: 0

i completely understood all of this. Also, I am a liar

pretty useful.......The subtitles

The Doppler Effect, when you state the energy relation between the energy in the two frames, do you get that via the relativistic doppler effect formula relating the frequencies in the two frames and if so how? I tried taylor expanding in the limit v

You have to make longer videos. I had to watch this video like 666 times to understand this...

I like how the videos explaining the most complicated stuff in the universe are always the quickest and shortest. Way to go 👏👏👏

I’ve watched this video 5 times now and understood the equation less and less every time.

Some time ago I watched another video with a proof of e=mc2 by you which I thought was better, and simpler, but now I cannot find that video anymore. Can you please give me the link to that one.

CAT CAT CAT CAT CAT CAT E=MC2

I am pretending that I understand this to feel smart. =)

E=MC² (Energy equals mass, times the speed of light squared.) As elementary as this is, I feel like I need to dive a lot deeper to fully understand every aspect of it. Loved the video!

minute physics is the only channel that will get me to learn things in my free time

As a not native english speaker it's really hard to understand everything in this "fast way" you talk.

.....um yeahh..i dont get it

I really like your usual video format, but I could really use more info

Hat's off Man for your intelligence to understand me so quick. Thanks a lot 😀

Tip : watch with speed x0.75 .

I used a calculator for 10+12 in a test just to be sure.

"A cat floating in empty space" Albert's mind: cats cats cats cats cats cats cats

Perfect explanation. No relativistic mass included! best derivation out there!

Now I feel like I understood more in "Rap god" than this ;)

Who else came to this video with lots of expectations and went back with an empty head 😂😁

You can also derive the same formula by relating it to spring energy. When the spring is compressed, the mass very slightly increases. Why?

Why is this being recommended 9 years later to me??

And I though E was the short form of einstein

Its so crazy that you can prove this formula algebraically using an anecdote! Never would have thought of combining the Doppler effect and the conservation energy, in order to create a formula for everything!

At 1:09 you introduce a formula with c squared. I can see now how the c squared gets into the Einstein equation but… I now have no idea where to look to understand the equation you used to introduce the c squared. Any suggestions on what to search for in Google for this?

Great video. I'd have lots of question if I was travelling in space and saw a radioactive cat emittng light whilst floatin, but, anyway, great explanation.

No idea what u just said. :)

I didn't get all of this, please speak faster next time

Damn. This video might be old, but it actually made sense in a way. Wow.

This leaves me with more questions than before

I have a degree in physics and I am going to have to watch that two or a dozen more times.

I lost you after the word "in"

just wondering , when you said that the new energy was E•(1+v²/2c²) isn't it supposed to be E/sqrt(1-v²/c²) ? well one thing that's true is that around velocities close to light the formula above is an approximation via Taylor's Expansion , but doesn't that mean that E=mc² is a mere approximation ?

Very concise and intuitive explanation

All I understood was a psychotic cat roaming around in space 🤣🤣

so..... there's a cat floating in space somewhere?

Why in the first case of cat flying then emiting energy is the energy emited multiplied by (1 + v^2 / 2c^2) ? What really confuses me about it is the presence of the speed of light in that equasion. And why is the velocity and speed of light squared?

Now this Einstein's nephew made it more hard to comprehend.welldone.

You may as well be speaking another language bro...

the comments are funny af!!

Simple Explaination of the video as I understood it: 0:15 Cat's Energy is converted into light energy of amount E. 0:41 Relativity observation, you probably understand this. It is just a viewer observation which is a part of Relativity. 0:44 Cat has energy since from your point of view it is moving and hence has kinetic energy. The kinetic energy converts into light energy meaning Energy of cat= KE-E 1:08 Doppler effect which is relativistic light energy 1:12 Recap of every scenario we have created yet. 1:31 Law of conservation of energy 1:49 Simplification 1:57 E=Mc²

Amazing how he came up with this just by imagining a scenario

that cat is going places

Having read Einstein's paper a long time ago, I recall that his explanation was a lot easier to follow, and it didn't need to introduce silly objects like spaceships or a cat. Nice attempt, but I think your derivation is too fast, doesn't explain the fundamental concepts enough, and has superfluous elements on top. Redo it at once.

I should be studying for a Math Test but I'm learning this instead I already understand this more

Instructions unclear, now I'm travelling faster than speed of light and can't stop

This guy doesn’t even want us to understand He is just showing of

Listen to the video at 0.5 times speed. Henry's drunk.

Everyone is confused but this actually explains it really well for a 2 minute video.

This proves once and for all that cats are the strangest beings in the universe.