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Light allows us to interact with our world. We can see our surroundings because light bounces off objects into our eyes. We are all familiar with visible light, but this is merely a small portion of the electromagnetic spectrum. In fact, there are many different types of light ranging from short wavelengths, like x-rays, to longer wavelengths, like radio waves. These types of light blend together to make a continuous spectrum of electromagnetic radiation. By filtering out various regions of the electromagnetic spectrum, one can receive different types of information.
We assume that the way humans see the world has some correspondence to objective truth. That’s not necessarily correct. Let's do a thought experiment where we have a quick chat with an alien species to see how mistaken we are about the universe.
The tweaks to their vision might be minor. They might just pick up, visually, on different stars than we do, seeing things in the infrared range or the ultraviolet range. Since we now have plenty of telescopes scanning the skies and picking up on parts of the electromagnetic spectrum that we can’t see, it would just be a matter of superimposing our visual star maps on their visual star maps to get some common ground.
But what if they don’t see anything remotely within our visual spectrum? Let’s say that they evolved on a planet not powered by light from a nearby star, but from vents from the planet’s core. Light, and vision, might not be a big component of their senses. Perhaps, for whatever reason, they only see ultra-high energy light given off by quasars, which perch at the centers of galaxies. They wouldn't realize there was the possibility of life in the outer reaches of a galaxy before we contacted them. Or they might only be able to see quickly changing light, and can only navigate space by pulsars. There’s even a possibility that they can only, visually, pick up on very faint microwaves, and it never occurred to them that there was life in the universe, because they only saw the faint, homogeneous smear of the cosmic microwave background. Never mind how we’d contact a society like that, how would we even begin to explain who we are and where we came from?
If we sorted through the first contact and they got to Earth, there could be even more problems with light. If they only saw in x-rays, we very well might look like bags of bones with weird, invisible flesh around them. (Also, any prolonged exposure to alien “flashlights” would kill us.) But what, for example, if they only saw polarized light? We know that some animals can see polarized light, and it’s thought that they navigate by the natural polarization that light goes through in the sky throughout the day. But what if a species can see polarized light and nothing else? Because vertical and horizontal surfaces polarize the light that hits them, the aliens would see a multicolored sky, blinding walls of light from windows, the hoods of cars, lakes, and puddles, but wouldn't be able to see any humans. (Although they would, in sunlight, be able to catch the intermittent glare coming from our glasses. How creepy would that be for them?)
The wiki for space observatories lists 9 categories, only one of which is in visible light which humans can perceive.
neoholographic
Biocentrism says we try to come up with every theory in the world to explain what's going on out there but we should be paying more attention to how life and the mind perceives the world that we see.
Again, this is just common sense based on what we know about science.
1 Gamma ray
2 X-ray
3 Ultraviolet
4 Visible
5 Infrared and Submillimetre
6 Microwave
7 Radio
8 Particle detection
9 Gravitational waves
Edit: Where do you see this type of perspective leading us to in the future? What can come out of it? Just a different perspective or something more? A brand new way of thinking for everyone?
RationalDespair
reply to post by Arbitrageur
No, no, you totally missed the point this time. It´s not about visible light at all, it´s about the way we perceive reality, and perception, as you state in your own post, is a very broad concept.
Everything we smell, touch, see, feel, think, observe, i.e perceive, is the direct result of a perception and the interpretation of that perception by our brain. This includes the telescopes and other instruments that measure and collect. Instead of looking at the perceived data, we should be looking within ourselves and solve the mystery of why it is that we perceive reality the way we do.
I used to be a fanatic follower/defender of the scientific method, until I read books by Prof. Ouspensky and Gurdjieff and realised that absolutely nothing outside of myself can be positively proven true. No matter how you spin it, the only thing I can be sure about is my own consciousness, everything else is a perception or interpretation.
So I should tell my astronomer friend, "you don't need all those telescopes, just look within yourself?" I'm pretty sure he will give me funny looks if I do that.
RationalDespair
Everything we smell, touch, see, feel, think, observe, i.e perceive, is the direct result of a perception and the interpretation of that perception by our brain. This includes the telescopes and other instruments that measure and collect. Instead of looking at the perceived data, we should be looking within ourselves and solve the mystery of why it is that we perceive reality the way we do.
Richard Feynman said that over five decades ago so I'm not sure why it took you so long to catch on to that idea that science can never prove anything completely true. That's why we call them "scientific theories" when they have a mountain of evidence behind them...because we could still find one more piece of evidence that falsifies the theory. In fact by definition everything in science is falsifiable; if it's not falsifiable it's not science.
I used to be a fanatic follower/defender of the scientific method, until I read books by Prof. Ouspensky and Gurdjieff and realised that absolutely nothing outside of myself can be positively proven true.
1.All matter consists of invisible particles called atoms.
2. Atoms are indestructible.
3. Atoms are solid but invisible.
4. Atoms are homogenous.
5. Atoms differ in size, shape, mass, position, and arrangement.
“Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.”
Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.
Arbitrageur
So I should tell my astronomer friend, "you don't need all those telescopes, just look within yourself?" I'm pretty sure he will give me funny looks if I do that.
Richard Feynman said that over five decades ago so I'm not sure why it took you so long to catch on to that idea that science can never prove anything completely true. That's why we call them "scientific theories" when they have a mountain of evidence behind them...because we could still find one more piece of evidence that falsifies the theory. In fact by definition everything in science is falsifiable; if it's not falsifiable it's not science.
neoholographic
The point is, if you're a fanatic about the scientific method then you can't think outside the box.
Arbitrageur
So I should tell my astronomer friend, "you don't need all those telescopes, just look within yourself?" I'm pretty sure he will give me funny looks if I do that.
swanne
Now about the OP: biocentrism is not logical. It states that for matter and energy to exist, the observer must exist, since it's the observer who creates al this in his mind. Then how come we came into existence in the first place? For without observers, the universe didn't exist, right? Then how come the Earth existed if there was no minds observing it?
]Neoholographic, this thread belongs more in the "metaphysic and philosophy" forum than "physics and technology". Biocentrism is an interpretation of an interpretation of a theory in physics.
Now about the OP: biocentrism is not logical. It states that for matter and energy to exist, the observer must exist, since it's the observer who creates al this in his mind. Then how come we came into existence in the first place? For without observers, the universe didn't exist, right? Then how come the Earth existed if there was no minds observing it?
According to quantum mechanics, light can be either a graceful rippling wave or a hail of bulletlike particles, depending on how you look at it. Now, an experiment shows that an observer can make the choice retroactively, after light has entered a measuring apparatus. The result shows that reality is truly in the eye of the beholder.
Even weirder still, the choice to allow the waves to recombine or not can be made even after the photon passes the fork where it should have split--or not. Famed physicist John Archibald Wheeler realized that nearly 30 years ago and dreamed up an experiment to prove the point. Now Jean-François Roch of the Ecole Normale Supérieure de Cachan in France and colleagues have performed the experiment. The researchers shot photons one by one at a half-silvered mirror, or "beam splitter," to cleave the quantum wave describing each photon. After traveling different distances, the two halves sloshed back together at a second beam splitter 50 meters away, which could recombine them. The experimenters could randomly switch this second beam splitter on and off electronically well after the photon had passed the first one.
If the second splitter was on, interference between the two pieces directed the recombined wave of probability toward one or the other of two detectors, depending on the difference in the path lengths. If the second beam splitter was turned off so the waves couldn't recombine, then the photon took one path or the other with 50-50 probability, and equal numbers of photons reached detectors. The results, reported this week in Science, prove that the photon does not decide whether to behave like a particle or a wave when it hits the first beam splitter, Roch says. Rather, the experimenter decides only later, when he decides whether to put in the second beam splitter. In a sense, at that moment, he chooses his reality.