Measuring the Speed of Light - Wonders of the Universe w/ Brian Cox - BBC
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In the last episode of Professor Brian Cox's epic journey across the universe, he travels from the fossils of the Burgess Shale to the sands of the oldest desert in the world to show how light holds the key to our understanding of the whole universe, including our own deepest origins. To understand how light holds the key to the story of the universe, you first have to understand its peculiar properties. The man who first grasped these properties was Danish astronomer Ole Rømer, who in 1676 made the first quantitative measurements of the speed of light. Subscribe to the BBC Worldwide channel: http://www.youtube.com/subscription_center?add_user=BBCWorldwide BBC Worldwide Channel: http://www.youtube.com/BBCWorldwide Having explored the wonders of the solar system, Professor Brian Cox steps boldly on to an even bigger stage - the universe. Who are we? Where do we come from? For thousands of years humanity has turned to religion and myth for answers to these enduring questions. But in this series, Brian presents a different set of answers - answers provided by science. This is a channel from BBC Worldwide who help fund new BBC programmes.
Comments
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I don't think that is the correct explanation.
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When they measure of the speed of light do they include the time the light takes to travel through your retina and your brain?
To process the light that would add a couple of m/seconds to the distance. -
I'm skeptical..... What about the angle of the planet and how it could hide the Moon for a longer period of time....
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Holy derp if it was already established that jupiters moon appeared to do a full orbit in PRECISELY 42.5 hours the how the hell did they re establish that it now appears to slow down or speed up sometimes.... There is a logical fallacy here.
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Wonderful
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does anyone love the feeling u get when u finnally realize something?
you go OOOOHHHH NOW I GET IT -
Can someone help me understand where I may be going wrong please. I still cannot find an answer...
Here a thought experiment for you; If the sun (8 light minutes away) were hurtling towards the earth at light speed, starting at 0800...
1. At what time would we realise that the sun has reached us(or even began moving)?
A. 0808, as the visual information of the sun moving and it actually reaching us is the EXACT same i.e. c
2. From the perspective of the Sun moving towards Earth, all the visual photons from the Earth would be travelling towards the the Sun at light speed (whilst travelling towards the photons at light speed itself) so the Earth would seem TWICE as vivid but would be seen to be getting closer for the entire 8 minute journey, therefore, how can it be that concluded that time stops at c?
This shows that;
A, there must be a medium in which energy (photons) travels that has a maximum(?) and constant velocity of propulsion (c), call it Ether or whatever you want to, but it CANNOT be absolute nothing.
B, TIME and SPACE are independent, there is no physical thing called time-space, only space that changes over time, and time does exist due to potential and entropy.
C, time dilation and spacial contraction are false as the sun (within it's own inertial frame) existed for the 8 minutes while it traveled, where relativity would like you to believe that it could not have experienced any time while traveling at c.
Please, someone have a logical answer, thing is driving me crazy, especially as the twin paradox is proven wrong too! I suspect we pretend to know a lot more than we do! -
He didn't measure it.
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Is this the only evidence that light has speed , pretty flimsy really.
Why is Doppler not considered , Eg; The 2 planets moving away - moving toward each other in respective orbits.
Jupiter's moon Io the frequency 'cycle' , just as the beat "cycle" of music playing in a fast car heading toward the observer the beat is at a faster tempo than when the car is travelling away from the observer. -
I wish this series and Wonders of the Solar System were on Netflix...
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Which light speed are you talking about?
When you observe the reflected light from mars that means you saw mars. Right?
But, do you see the light as a wave? or do you see mars as a wave?are you able to measure that wave with your device (detector)?
I mean when we say light speed we may need to answer the related question: which light? which light speed? Right? -
Speed of light is not equal to 'speed of light (C)'
Does mirror (reflector) transmit signal (energy) to detectors when energized by incident beam of light?
When we use reflection method to measure light speed does the reflector transmit its own signal to the detector, when energized by incident light or just reflect the light? Do detectors detect signals moving at more than 'light speed (C)? No, because
Clearly speed of light is much much higher than 'light speed (c)', and we know that by the fact that we observe the farthest object just in a moment.. Right? Thanks. -
The Genesis Effect" We are not alone in the Universe.
Quantum entanglement spooky action at a distance explained with what I call "The Genesis Effect" of anti-matter energy. The answer to how particles can be in two places at one time communicating with each other are in the understanding of anti-matter energy and a multi-dimensional universe within a universe. When we separate an atom it moves to another dimension however, as soon as we attempt to look at it, it seems to disappear. The reason is, that you have to be in the other anti-matter universe to be able to see it. Particles of matter and anti-matter spin opposite of each other, what we do in our universe affects the anti-matter universe. And what the anti-matter universe does in its universe affects our universe. The Universe uses the same force of anti-matter for all information to travel through a black hole without the fundamental laws of physics being destroyed. I call this the "Genesis Effect". So if atoms can be in two universe's at the same time, then so are you. The atoms of the Universe are alive with intelligence in another dimension. You will never look in the mirror the same again grin.
A universe within a universe where man and all matter are regenerated over and over again, each universe a clone image with the exact fundamental laws of physics. Black holes 'big bangs' are just the latest in an infinite number of cycles going back into the past and into the future. It seems that time may just be a 'frigment' of our imagination grin. Gravitational waves, ripples in space-time suggest that the universe did indeed expand many times faster than the speed of light in the first few instants after the Big Bang. "cosmic inflation - external inflation theory- accelerated by anti-matter-energy. -
can't u just measure it with that radar gun that cops use to see how fast cars are moving?
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I respect professor cocks but honestly the speed of light is still a buzzler. If einstien says it's constant regardless of the speed of the emitting object then certain lights would have different speeds. I am confusef
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If the speed in which jupiters moon moves around jupiter is definitely known to be constant always like our moon then this proves the speed of light unless there's some kind of strange material we haven't detected that the light is travelling through at that particular time. I hate how they say things as if it's matter of fact absolutely... if they were honest... more people would make theories and the more theories the better the theory will be.
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you know shit is going down when Brian's in a desert
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Toxic Toker, the universe has been inflating at 136,000 miles per second, for 13.7 billion yrs. Our minds cannot comprehend the enormous size of the universe,
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That explains nothing is more than 6k ly away.
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Cool!
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