9 Light Experiments That Will Blow Your Mind
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Published 2024-04-20
But here's the cool part – as we grow up, we find out that light is not just there; it's kind of mysterious. You can't touch it, but you can see it everywhere, especially from the Sun. All stars produce light!
Even though light is super important for life on Earth, we don't know everything about it. Scientists have been puzzled by this invisible thing for a long time. So, in this video, we'll check out how holograms are made, learn the secrets behind your sunglasses, and even figure out why the speed of light is the way it is. Join us as we dive into experiments that shine a light on the stuff that brightens up our world.
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Newton’s Prism and Pink Floyd
Would you believe me if I told you that the iconic Pink Floyd album cover, "The Dark Side of the Moon," shares a profound connection with Sir Isaac Newton?
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Young’s Double Slit Experiment and Fresnel Lenses
In the 19th century, Augustin-Jean Fresnel and Thomas Young brought about a significant change in our understanding of light by supporting the wave theory.
Single Photon Double Slit Experiment
In Young's experiment, originally, a full beam of light passed through the slits. But then someone had a curious thought: What if we sent only one photon at a time through the slit?
Einstein's Photoelectric Effect and Planck's Quanta
Einstein himself acknowledged that meticulous experiments could reveal whether light behaved as particles or waves. In 1905, he delved into the photoelectric effect, a phenomenon discovered two decades earlier by scientist Heinrich Hertz.
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As you can understand, a series of experiments on the nature of light triggered a paradigm shift in our understanding of reality. This transformative period altered the course of science, prompting scientists to reexamine past experiments and search for clues that would contribute to a groundbreaking theory of light. This emerging theory challenged our existing knowledge and paved the way for the development of quantum theory. Since those pivotal moments, science has never been the same, and the exploration of light has opened up new realms of understanding.
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Speed of Light!
But let’s leave behind the dual nature of light for a moment, and focus on another of its intrinsic properties: speed.
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Dirac and the 3 Polarizers Paradox
In this video, we're discovering that intriguing phenomena unfold when we manipulate light. Fresnel, known for his fascination with lenses and light, was well aware of this.
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Compton and Rayleigh Scattering
It's important to note that not all scientists were initially convinced that light could exhibit both wave and particle characteristics. This skepticism led scientists from diverse backgrounds, countries, and time periods to conduct their own experiments in an attempt to better understand the nature of light.
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Temporal Double Slit Experiment
Let's think again about the coolest experiment with light – the double-slit experiment. It showed that light can act like both a wave and a particle. Now, in 2023, scientists at Imperial College did something neat.
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The Probabilistic Nature of Reality - A Thought Experiment
Here's the deal: when we try to observe light, it's like catching it playing hide and seek. It decides to be all discreet and quantized, snapping to specific values. No one really knows why it does that – it's a cosmic mystery.--
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Credits: Ron Miller, Mark A. Garlick / MarkGarlick.com ,Elon Musk/SpaceX/ Flickr
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00:00 Intro
1:00 Newton’s Prism and Pink Floyd
3:18 Young’s Double Slit Experiment and Fresnel Lenses
9:30 Single Photon Double Slit Experiment
11:58 Einstein's Photoelectric Effect and Planck's Quanta
15:40 Speed of light!
21:44 Dirac and the 3 Polarizers Paradox
24:40 Compton and Rayleigh Scattering
30:10 Temporal Double Slit Experiment
32.30 The Probabilistic Nature of Reality - A Thought Experiment
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#insanecuriosity #light #quantummechanics
All Comments (21)
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Love that you mentioned pink floyd
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The people who set the standards in the metric system redefined the meter slightly to make the speed of light EXACTLY 300,000 kilometers per second. That's the new definition of the meter. :-)
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Great video and information !
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Yeah, I guess it wouldn't make much sense if the first thing we saw when we were born was sound. Good point.
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There's more to light that meets the eye.
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You explained a lot of the things that people often forget to mention and it would be nice to see even more detailed videos let go into a deeper explanation.
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Realy I like this video
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If a wave of light hits a 100% reflective surface exactly perpendicularly, how does it's reflected speed compare with: A. Its incoming speed, and B. Its speed off an equally reflective surface at an incidence of 45 deg. Intuitively, I sense that there must be some destructive interference in case A, and some constructive interference in case B, which should create a speed differential between A and B?
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0:03 Light? It's the only thing we see. When we're born, or any other time.
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I like the background music! Interesting video!
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What about your inner light? Phosphenes anyone? Nice vid dude.
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At the timestamp 1:51, if it's a visible light moving through air and if the prism is made up of glass then the direction of the refracted beams are incorrect. They should refract downwards, not upwards.
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And maybe lights and gravity can make the space to expand or construct
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Ever notice how light is the only thing you’ve ever seen?
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At 0:33 you called light "invisible." Huh?!
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Don't forget that watching mean interaction of any beam with our detecting apparatus. So, that we see and one time is different from the other, isn't the light, but it is the interaction.
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I have Walter Russell's book "The Secret of Light" which breaks everything down in great detail very deeply and profoundly.
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The real meaning of temporal Double Slit Experiment is that the second beam which interact with the first, did the distance to the moment of the interaction in a speed 2 times the speed of light. If the speed of light was stable, then the two beams will not hit the one the other as the two beams have been produced at the same time..
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I don't remember light being the first thing I saw when I was born🤔
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Do you know that light emitted (or reflected) by a particle is visible only at a very specific angle to the velocity vector of the particle (only if velocity=0 it is visible from any perspective). That is simple outcome from Einstein's Special Relativity. And that first time ever explained vanishing without any trace stars, observed for about 80 years by astronomers. Read "The Main Observation Problem, Challenging Astronomy, Solved Today" (and “Science of Visibility and Invisibility” link inside).
