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  1. R

    Anyone here study quantum mechanics for fun?

    I don't buy into the notion that quantum mechanics informs more about reality than other frameworks, so I don't think that changing my understanding of reality is enough to accept that one actually gains some kind of understanding from it. One gains, but not as definitive as one would hope, imo...
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    Anyone here study quantum mechanics for fun?

    I don't entertain it much, but does anyone even understand quantum physics yet? Can't have fun learning something I can't understand (don't really try, though). On another note, I find it one of the most interesting topics to learn about, which is why it's one of the most frustrating...
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    Livionex dental gel --a plausible improvement on toothpaste?

    Yeah, quite a bit more expensive than the norm. For now, they seem to get away with it judging by the huge popularity of the product on Amazon. Probably more worthwhile to gamble for those managing gum disease. For people with health teeth and gums and with no problem with conventional...
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    Livionex dental gel --a plausible improvement on toothpaste?

    This dental gel aims to disrupt the toothpaste market with a new mechanism of action. As far as I understand, brushing with it boosts the negative charge on tooth surfaces, making it more difficult for bacteria to attach... even though bacteria are also negatively charged... Presumably, this...
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    What physics knowledge would be required to build a house?

    Almost anything with a roof can be called a "house". That's good enough to other animals who build inhabitable structures. It'd be a heck of a lot more difficult to survive if specialized knowledge was required to create a shelter of some kind. Modern human structures are designed with new and...
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    Medical Knowingly taking placebo pills eases pain, study finds

    "Our findings demonstrate the placebo effect can be elicited without deception," No. "Taking placebo pills to relieve symptoms without a warm and empathic relationship with a health-care provider relationship probably would not work," Expectations from the environment can be manipulated and...
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    B Juno/JunoCam mission

    Yumy. Was hoping to see closer pics of the surface, though. Maybe it didn't orbit around the sun-lit side.
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    Creating technology from primitive conditions

    Not particularly materialistic, but I value access to information. Hard to live without that privilege. To assuage existential torment I'd self-proclaim king of the jungle, build an empire of animal slaves through the rule of fire and scratch my butt all day. Privilege of the lunatic sorcerer...
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    Stargazing What is Hubble's field of view?

    If this is of interest... From one of Hubble's FAQ pages: "If the Hubble Space Telescope pointed to Earth, what resolution would the images have? Hubble's so-called angular resolution — or sharpness — is measured as the smallest angle on the sky that it can resolve (i.e. see sharply). This is...
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    B Juno/JunoCam mission

    Can't wait for the pics. Waiting for Pluto's high resolution imagery was hard but worthwhile.
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    Why do computer generated faces differ from real ones?

    Both CGI. I'd peg the woman real too if I didn't know it's CGI.
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    Why do computer generated faces differ from real ones?

    Hardware is a limitation in real-time rendering applications. Consoles and PCs still lack the horse power to render truly life-like CGI on the spot. There's also the fact that faces are particularly tricky objects to model and animate realistically. The best CGI is found in pre-rendered...
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    What in your opinion is great?

    Consciousness is great. Beauty is great. Dreaming is great. Everything is absurd, which is great.
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    Space Stuff and Launch Info

    I don't know when or if the project will be realized, but sure hope it will.
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    I If the observable universe was visible to the naked eye...

    I was picturing something like that. --------------------------------- There's a lot to find out yet.
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    I If the observable universe was visible to the naked eye...

    Sorry, I see what you mean now. Imagine that we look through the cross section (arbitrarily small radius) of the intersection between the cone and the sphere to see if there's any 'radiating' matter inside the cone. This is exactly what I mean. (planets, comets, anything bigger than a dust...
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    I If the observable universe was visible to the naked eye...

    I see. I was kinda imagining this exercise including all those galaxies that can only be detected outside of the visible spectrum, but as if they magically became visible to us. Like literally make all luminous objects within the observable universe visible to the naked eye. But I guess there...
  18. R

    I If the observable universe was visible to the naked eye...

    This flies over my head. But I'll read on it. Thanks.
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    I If the observable universe was visible to the naked eye...

    Just visible ones. Right, I was wondering about this image. I'm not sure about how deep into the past those galaxies are, though. Is this really the edge of our observable universe? Yes, given the eye resolving capability it would probably look like a close to uniformly bright sky.
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    I If the observable universe was visible to the naked eye...

    Lets assume that all the stars, galaxies, clusters, are all magically equally bright in the night sky to our eyes. What I'm really asking is if there would be any line of sight that wouldn't end up on the surface of a luminous object. Let me know if I'm not making sense...
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    Is there a lack of science in our justice system

    Has any court ever sentenced people on the "basis that they have free will" while disregarding empirical evidence? How do you suppose that legal systems would work without the fundamental assumption that people are inherently responsible for their acts? And how could people be fairly tried if...
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    I If the observable universe was visible to the naked eye...

    What would the Earth's night sky look like? Would our eyes see any dark spots? Is there are way to calculate such a probability? This hypothetical is about the observable universe only. 93 billion light-years diameter, isotropic, visible light. Not sure what's the most appropriate tag for this...
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    B Why water looks transparent while spray looks white?

    All those optical effects mentioned above. A bit like the same reason why a pair of corrective glasses works for one person and not for somebody else.
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    Why not use electricity directly instead of hydrogen

    Would more make sense to keep diversifying the energetic diet of the fleet instead of specializing on a single dish. The hybrid concept should be developed as greener paradigms start taking over. An omnipresent electric grid need not be mutually exclusive with hydrogen or any other...
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    What's the simplest entity that can have fun?

    You seem to be talking about sentience--the ability to feel and experience subjectively. A philosophical Pandora box. Feeling "joy" is a sentient experience. Whether 'intelligence' is a prerequisite for sentience (or vice-versa) is open for debate (and we may have to throw 'consciousness' into...
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    B A terrestrial, temperate planet around Proxima Centauri

    Wikipedia has a good article on Proxima Centauri. Almost anything you'd like to know about it is there. This is wrong, by the way. Launch is scheduled for October 2018, so more like three years.
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    Methane as a substitute for petroleum in combustion engines

    Germany has been taking it seriously... in a carbon-neutral way. Or spray those cars with some solar screen...
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    B A terrestrial, temperate planet around Proxima Centauri

    No space imaging technology is based on the premise of sending a signal to a target and analyze it's bounce back. It's unnecessary and not really practical for objects that are light-years away. We can simply analyze the light received from an object. The problem is that imaging exoplanets is...