Recent content by whydoyouwanttoknow

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    High School How Does Light Behave When It Passes Through Different Mediums?

    Yeah. So are they though counted as new photons or does physics count them as the photons that came from the sun?
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    High School How Does Light Behave When It Passes Through Different Mediums?

    Well is it counted as the light that came from the other side of the window or is it counted as light from the atoms in the glass?
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    High School How Does Light Behave When It Passes Through Different Mediums?

    Ok, I don't want no equations and stuff please. :smile: When light travels through a medium the photons are absorbed by atoms in the medium and then a photon is given off by the atom of similar energy, etc, this is correct? If this is so does that mean when I look out the window that I'm...
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    Undergrad Why Doesn't a Photon's Energy Knock Us Out?

    I told him to get a particle with mass to the speed of light you'd need infinite energy and that would cost you. :smile: I don't know how to calculate anything with this stuff. I just read this stuff for fun. :eek:
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    Undergrad Why Doesn't a Photon's Energy Knock Us Out?

    I said the power bill would cost you a fortune. That'd be correct right propelling a particle with mass to the speed of light.
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    Undergrad Why Doesn't a Photon's Energy Knock Us Out?

    One of my friends told me that photons would have to have mass or they couldn't exist. I told him that if they did have mass a photon would knock you on your arse and turning on a light would cost you a fortune when your power bill arrived.
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    Graduate Is the cat in Schrodinger's thought experiment actually significant?

    The phone rang. It's the cat. It said for you guys to get in the box and see what you think now.
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    Undergrad Is Time Travel Backwards Theoretically Possible?

    Kip Thorne and Hawking have a bet on traveling back in time. What's that conjecture... um... the Time Protection Conjecture or something. Basically any time machine would destroy itself the instant you tried to use it to travel back in time. Something like that.
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    Graduate Is the Universe Closed, Flat or Open?

    All the evidence seems to point at the universe been flat but I believe most scientists believe that it really is closed and they're searching for evidence.
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    Undergrad Is Object 2 Traveling at Double the Speed of Light Relative to Object 1?

    Yeah, photons have no mass.
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    High School Waves of any sort do not transfer mass

    Then there's the ocean currents.
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    Undergrad Is Object 2 Traveling at Double the Speed of Light Relative to Object 1?

    All particles with a rest mass greater than 0 travel at below the speed of light. Particles with 0 rest mass only travel at light speed. Particles with less than 0 rest mass should, if they exist, travel at only greater than light speed.
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    Graduate Does the fabric of space itself cause friction?

    I remember reading a while ago that the fabric of space has a texture and thus would cause friction. Even in a perfect vacuum a spacecraft would slow down over time due to this. Is this an accepted theory?
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    Stargazing What was the first object you saw through a telescope?

    I find the moon to be in the way now.
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    Graduate Dirty Bombs: The History and Potential Impact of Radioactive Weapons

    Dirty bomb. All you need is something radioactive (like enough to harm people) and a conventional explosive afaik.