Recent content by imaloonru

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    Graduate The True Nature of Hawking Radiation

    Zarqon: It's important to keep in mind that anti-matter particles do not have "negative mass", they have a positive mass, like any other normal particle. So when an anti-particle enters the black hole, it adds to the black hole's mass. Same for normal particles. The part where it looses energy...
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    Graduate How do magnetic fields do no work?

    Interesting point. Glad you brought that up! Thanks.
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    Graduate How do magnetic fields do no work?

    Indeed. I can see that since \vec{F}=q\vec{v} \times \vec{B} \text{ and } W = \int \vec{F} \cdot d\vec{r} then W = q\int (\vec{v} \times \vec{B}) \cdot d\vec{r} Since \vec{v} \times \vec{B} is perpendicular to d\vec{r}, the dot product, and therefore the work are zero. From the...
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    Graduate How do magnetic fields do no work?

    Thank you, Born. It makes sense now!
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    Graduate How do magnetic fields do no work?

    I remember learning in Electrodynamics last year that magnetic fields don't actually do any work. I don't seem to remember any of the explanation behind that. Can anyone explain why magnetic fields do no work (ie. How they differ from electric and gravitational fields). Thanks!
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    Graduate Can we see the Earth in the past

    It sounds like you're talking about gravity waves, which are the space-time disturbances created by a moving mass. Like Matterwave and Chronos said, these waves are very difficult to detect, and we haven't been able to detect the strongest of them until just recently. Unfortunately, it doesn't...
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    Graduate The True Nature of Hawking Radiation

    The idea is that particle/anti-particle pairs are being created all of the time. This process seems to violate conservation of energy and mass, since two particles are suddenly being created from nothing. However, this is allowed by the uncertainty principle, as long as that energy is "given...
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    Graduate Looking for online solar astronomy book/course

    Hello. I am looking for an online book or course (free) regarding solar structure/physics at the first-year graduate level. Can anyone point me in that direction? I've looked into it but haven't come up with anything very useful. Thanks in advance!
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    Undergrad When Should Physics Students Use Eigenvectors?

    Thanks guys. This helps.
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    Undergrad When Should Physics Students Use Eigenvectors?

    I'm a physics major. As such, I have come across several situations in my studies that require the use of eigenvectors and eigenvalues. Whenever I have to use this method, I've been told to. I do not have a complete understanding of eigenvectors and values and am wondering how you would spot a...