yagirllily2k24

[yagirllily2k24]

do you ever make a social media account, and completely forget you can post until like months later and so you post some random crap to the first place you can just to assert dominance over the platform you are on?

[yagirllily2k24]

Random thought of the day: the reason scientists use measurements such as "light-years," when describing how far an object is, lies in the definition of the speed of light as a constant. When describing time, special relativity reveals that time, like space, is relativistic, so any event observed by a given observer, A, can be described by another observer, B, such that both observers describe the same event relative to their reference frame.

However, due to each observer describing the event relative to their reference frame, and due to special relativity revealing relativistic length contraction, using units of length is unreliable. So, instead, the speed of light multiplied by some time unit can be used to describe distance.

Since the speed of light is constant to all observers, and speed is, by definition, the same as velocity (v = dx/dt), by multiplying by some t value (with respect to a given observer), the distance value relative to a given reference frame can be found.

Interestingly, this also ties in quite elegantly to the concept in special relativity's exploration of masses being affected by their relative velocity via relativistic momentum, such that mass can be relativistic as well. This all, of course, ties quite elegantly into general relativity, which shows that these concepts are not only linked but conceptually dependent on each other.

General relativity shows that time and space stretch and warp in a manner akin to the surface of a trampoline in the presence of either large masses or large energy fields. Thus, since mass affects time and space, mass can affect distance length in a similar way as velocity does. Hence, why "light-units" are used in the measurement of distance when discussing cosmic distances.

Or maybe I'm just sleep deprived and talking nonsense. Idk. 🙃