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  1. K

    Speed of light barrier

    Thank you kindly Mr. tiny-tim!
  2. K

    Speed of light barrier

    I am not an expert on Physics and have for the past year been engulfed in work, so I am very rusty. I read a comment online recently that essentially said the laws of physics simply prevent any object from accelerating to the speed of light (infinite energy required?), but do not say that an...
  3. K

    Is during lightning clouds losses some its mass?

    Are you asking if the electron flow from the lightning affects the mass? In that case, I guess it would very slightly. I'm not sure if the electrons flow into or out of a cloud.
  4. K

    Can you stand on enough concentrated light?

    I think it depends which direction the photons are moving. Photons do impact objects and move them slightly (I think there was a gold foil experiments at some point in time). So, I believe it's possible if the photons are opposing the force of gravity by hitting the bottoms of your shoes.
  5. K

    Lighting a candle, blowing it out and relighting it by lighting the smoke?

    The wick in a candle doesn't actually burn. What happens is the wax melts into a liquid, and travels up the wick. The wick essentially soaks it up. When the liquid gets even hotter, it turns into a vapor - this vapor is what burns. That's why when lighting a candle, you have to hold the...
  6. K

    The effect of Earth's Roatation on Flight

    Without moving relative to the air - yes. The air doesn't rotate as fast as the earth. If you could float within a single air pocket and stick with it for a day or two, sure. But the wind patterns may take you places you don't expect!
  7. K

    The effect of Earth's Roatation on Flight

    It definitely has an effect! In flight school, you do learn about it. It is called the Coriolis effect. If you look at international flight paths, most of them are parabolic rather than direct to the destination. This is because they take into account the rotation of the earth. I don't...
  8. K

    Photon Sails in Interstellar Travel

    I guess I'm a little confused as to why you say it requires so much power. Neglecting inefficiency losses, moving any object of given mass at a given acceleration will require the same amount of power regardless of propulsion method. Are you saying that it's surprisingly inefficient?
  9. K

    Photon Sails in Interstellar Travel

    Why can't it be? How fast do you want your sail to travel, and in how much time?
  10. K

    True or false, the only type of information we receive from outer space is light?

    I guess I assumed that TS wasn't really trying to draw that distinction.
  11. K

    True or false, the only type of information we receive from outer space is light?

    Sure we do. What do you think meteorites are?
  12. K

    True or false, the only type of information we receive from outer space is light?

    Theoretically, anything at all can be considered "information". Perhaps all the bits and pieces of rocks that go through our atmosphere are encoded with some information. Anything that exists can technically be considered "information".
  13. K

    Change the direction of light without using matter

    Sorry man, it's not going to happen. You will need active devices to build anything useful.
  14. K

    Negative speed of light

    There is no "universal time". There is only time as experienced by observers (us) and time experienced by the matter of the universe. To get straight to your question, here's how it works: If you were to travel really really fast (99.99% the speed of light) for some period of time, you would...
  15. K

    How can this laser project a point in three-dimensional space?

    What Xitami is saying is that the pointer could be sending some sort of communication signal to the 3D projection apparatus, in which case the projection apparatus would actually be displaying the red ball. The observation of it coming from the laser, in this case, would be an illusion.
  16. K

    Information transmitted faster than light?

    Hi Preen, one thing that might help you understand is this: the molecules of any object (including your string) are held together by electrical forces (bonds) between the molecules. This is why the speed that a mechanical change propagates (such as pulling, stretching, moving, etc) has an upper...
  17. K

    Shape of light?

    No, light does not have a definite shape. Normal object maintain their shape because of different atoms bonding together in some way and 'holding on'. Light particles do not have any such bonds with each other.
  18. K

    Light Spectrometer

    I don't think you need any supercomputers.
  19. K

    Light Spectrometer

    As with most things, the more specific you get, the less an all-encompassing formula works.
  20. K

    Reflection of light upon ourselves

    Generally when light hits an object like a person, it bounces off in all directions, and if that light hits someones eyes, then they see it. What exactly is your question? What do you mean by the "true nature" of dark objects?
  21. K

    Black light

    http://science.howstuffworks.com/black-light.htm
  22. K

    Polarizing Filters

    http://www.glenbrook.k12.il.us/GBSSCI/PHYS/CLASS/light/u12l1e.html [Broken] Good explanation of the basics of polarizing light. This is just a guess, but here's my hypothesis: When the light passes through the first filter, the vibration in one plane is blocked. When you place another one at...
  23. K

    Does perpendicular incident light slow down through glass?

    Yes, it does slow down through glass, albeit very slightly. In reality, the light is being absorbed and re-emitted.
  24. K

    Why do radio waves work more

    I believe this answers your question: http://electronics.howstuffworks.com/question1.htm
  25. K

    How light produce? and why we can see it?

    http://science.howstuffworks.com/eye.htm 'nuff said.
  26. K

    Light: Wave or Particle?

    I had a very hard time grasping this at first two - what I kept doing was I'd try to imagine a wave made of particles, or something like that. It doesn't make a lot of logical sense, no. But science is based on what we can measure, and we can measure it as a wave and a particle.
  27. K

    Mirror reflection

    I've been asked the original question many times, I kinda thought this was the answer in my mind, but never could put it so elegantly. You're my hero, krab!
  28. K

    Alter the speed of light

    I am not an expert on the subject, but I believe that when light is slowed down by something, in reality what is happening is that the light is being absorbed and re-radiated from the molecules of the material/substance. So technically, the speed is never truly changed, between the radiation...
  29. K

    Risk of lightning strike on a car.

    No, lightning is direct current.
  30. K

    Faster than light?

    What pervect said is exactly right.
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