• Who am I?

    I am Qrystal; or at least, that's my dot-name! Har har. (My name is really Crystal, but that's not as internet-searchable; hence, switching the C for the little-used letter Q.)

    I am here because I enjoy writing. I do this mostly for myself, but I also have a passion for helping others learn things from the things I write. Now that I am done my Ph.D. in Physics, I am stepping away from academic research so that I can indulge in some creative ways to share my knowledge and inspire the appreciation of scientific thinking in others. I am also working as a tutor, which is one of the jobs I've most enjoyed doing in my life so far.


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    • Relativistic World Line Animation

    Posted by Qrystal on August 11, 2008 at 21:07.
    Category: Concepts. Tags: physics, relativity.

    I’m totally in awe of this image every time I come back to the Wikipedia article on Special Relativity.

    This animation shows how events in spacetime (the background dots) at various distances (horizontal axis) appear at various times (vertical axis, ticking by at a constant rate) to the observer (whose trajectory in spacetime is passing through the centre of the image).  The observer’s speed relative to the background events is given by the slope of the trajectory:

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