[Physics] Are there rainbows on other planets? If yes, are their colors the same? |
- [Physics] Are there rainbows on other planets? If yes, are their colors the same?
- When I shine a laser through a piece of glass, did the photons coming out of the other side of the glass originate within the laser, or do the glass molecules produce photons with identical modes as the incident light?
- When talking about photons, what does "wavelength" actually mean?
- Is there any examples of cells dividing into 3 or more daughter cells at once instead of the traditional 2 from binary fission or mitosis?
- Is it impossible for something to get colder if it is in a perfect vacuum?
- how do you structure a research lab meeting?
- Ask Anything Wednesday - Engineering, Mathematics, Computer Science
- [Physics] Would there be any benefit to a space mission hitching a ride on an asteroid?
- Is there acceleration in the granular flow of sand in an hourglass?
- [Biology] Are there animals thathave roles like humans?
- Does the Earth's mantle have the same composition and ratio of elements as the crust?
- If you were in a swimming pool on the Moon or Mars - Would you float higher, lower or the same?
- Is cannabis a vasodilator, or vasoconstrictor?
- Do we know for sure that there isn't anything to be said for the concept of something being below absolute zero?
- Does centrifical force affect you while you're not in contact with the spinning object?
- How does a fixed radio telescope focus on a specific portion of the sky?
- What causes days with similar weather to have different temperatures?
- Why can't scientists reach absolute zero?
- Why exactly does water have such a high latent heat of vaporisation?
- Why don't Faraday cages emit their own radiation?
| [Physics] Are there rainbows on other planets? If yes, are their colors the same? Posted: 27 Sep 2016 04:07 PM PDT |
| Posted: 27 Sep 2016 12:23 PM PDT Photon A ---> | Glass | ---->Photon B Is photon B generated within the glass? Or is B=A ? [link] [comments]  |
| When talking about photons, what does "wavelength" actually mean? Posted: 28 Sep 2016 05:09 AM PDT When I think of waves, I'm accustomed to thinking of s-waves and p-waves, but it occurs to me that neither of these make any sense in regards to photons that are supposed to travel in a perfectly straight line with a constant speed. Individual photons don't have fluctuations of energy that I know of, either. So where does the idea of a "wavelength" fit in? [link] [comments]  |
| Posted: 27 Sep 2016 09:44 PM PDT |
| Is it impossible for something to get colder if it is in a perfect vacuum? Posted: 27 Sep 2016 03:08 PM PDT |
| how do you structure a research lab meeting? Posted: 28 Sep 2016 08:17 AM PDT Hi I find myself in the curious situation of working in a clinical lab and having an idea which has turned into a fairly major research project with multiple institutions and more PhDs and MDs than I can count. Internally there are about 10 people working on it. How does one structure regular research lab meetings? [link] [comments]  |
| Ask Anything Wednesday - Engineering, Mathematics, Computer Science Posted: 28 Sep 2016 08:05 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Engineering, Mathematics, Computer Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| [Physics] Would there be any benefit to a space mission hitching a ride on an asteroid? Posted: 28 Sep 2016 02:37 AM PDT From mainly an energy/fuel perspective would there be a benefit to a spaceship/land being launched from earth, landing on an asteroid when it passes nearby and then waiting until the asteroid is near some other interesting planet, and then launching itself off the asteroid to land on the planet? [link] [comments]  |
| Is there acceleration in the granular flow of sand in an hourglass? Posted: 27 Sep 2016 09:27 PM PDT Hello, I was wondering if the particles of sand falling in an hourglass experience any acceleration at all. So far, what I've learned is that the sand particles are not affected by their height or pressure in the hourglass, and only by g and the diameter of the small tube in the middle of an hourglass. If they are falling in free fall with g, wouldn't it be so that the particles fall at a constant velocity? When velocity is constant, acceleration is zero. To the eye, it seems as though the grains start to fall a bit faster when there are less grains left in one side of the hourglass. [link] [comments]  |
| [Biology] Are there animals thathave roles like humans? Posted: 28 Sep 2016 07:16 AM PDT Humans have jobs, like teacher, police officer, etc. Are there animals that have roles like this, I know bees have different kind of workers, but they are that type of worker since they were born. Sorry, if the flair or my grammar is incorrect. [link] [comments]  |
| Does the Earth's mantle have the same composition and ratio of elements as the crust? Posted: 27 Sep 2016 09:47 PM PDT For instance, platinum occurs in the crust with an abundance of 5μg/kg (per Wikipedia). Does this rate hold in the mantle? [link] [comments]  |
| If you were in a swimming pool on the Moon or Mars - Would you float higher, lower or the same? Posted: 27 Sep 2016 02:25 PM PDT |
| Is cannabis a vasodilator, or vasoconstrictor? Posted: 27 Sep 2016 08:47 PM PDT I've seen many conflicting arguments online. Forums say it's a dilator while some websites say it is a constrictor. [link] [comments]  |
| Posted: 27 Sep 2016 06:27 PM PDT I realize that in our universe we can only approach absolute zero energy with less and less of a return ad infinitum. I also realize that I might look like I don't understand the concept of movement because something below absolute zero would require "negative movement." Maybe this is a question relating more to math than physics, but is it possible within our current theories that there is actually is such a thing as "negative movement?" I remember hearing (correct me if this is wrong) that, while matter obviously can't go faster than the speed of light, with analogous constraints to absolute zero, if it did, it would technically be going backwards in time. It may not even be a phenomenon that could exist within a universe, making this more of a math question than a physics question, but even if you technically never reach absolute zero, mathematically, there still would have to exist a concept for what happens "when" the universe gets there. (or maybe I don't understand math either, I'm trying to learn). [link] [comments]  |
| Does centrifical force affect you while you're not in contact with the spinning object? Posted: 27 Sep 2016 02:55 PM PDT My Dad is talking about centrifugal force as a kind of field. My question follows: Suppose you have a rotating, enclosed cylindrical object with a perfect vacuum in space (no gravity). If you enter from a hatch at the axis and push yourself straight at the other end, would you get pulled by centrifical force to the floor of the cylinder? We're curious because to my knowledge, centrifical force should only work while you're in contact with the spinning object. My Dad says otherwise. Also, what's the name of the force? [link] [comments]  |
| How does a fixed radio telescope focus on a specific portion of the sky? Posted: 27 Sep 2016 01:06 PM PDT I imagine fixed radio telescope like the 500 FAST in China and the Arecibo observatory focus by changing the shape of the reflector dish since it is mesh and not a solid. [link] [comments]  |
| What causes days with similar weather to have different temperatures? Posted: 27 Sep 2016 01:04 PM PDT Over the last three days, the temperature where I live has gone up by about 30 degrees, and is expected to drop by 10 in the next day or two, but the overall weather (mostly cloudless and sunny) has been the same for months. What causes the wild fluctuations in temperature? The amount of sun isn't changing, but I'm not sure what is. [link] [comments]  |
| Why can't scientists reach absolute zero? Posted: 27 Sep 2016 08:07 PM PDT I know that it almost impossible to reach absolute zero but what it happening that prevents us from reaching it? Also, how have scientists tried to reach absolute zero? [link] [comments]  |
| Why exactly does water have such a high latent heat of vaporisation? Posted: 27 Sep 2016 10:03 PM PDT I have always belived it was to do with the hydoren bonding but a colleague suggested it could be to do with the rotational properties of the atoms storing heat energy as kintetic. Help me ask science you're my only hope (or google). [link] [comments]  |
| Why don't Faraday cages emit their own radiation? Posted: 27 Sep 2016 07:18 PM PDT Having some trouble with this one: Assume we have a Faraday Cage with a radio inside. Don't the EM waves induce an electrical current in the Faraday Cage itself? Then, wouldn't the cage start emitting it's own radiation into space? That clearly must not happen, because it would not be a very good EM isolator. I guess this question works in reverse, also, with radiation coming from the outside. Thanks! [link] [comments]  |
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