Thread: Time Travel
View Single Post
Old 11-08-2004, 11:57 AM   #49 (permalink)
taog
Crazy
 
Location: London, Ontario, Canada
The scientific definition of time is that it is the period occupied by a body in passing from one given point in space to another.


It's more complicated than that though. The result of no time is hard to understand, just like 1d is hard for us to understand, which is just the result of the lack of our other 3 dimensions. It's actually really hard for me to understand what a world would be like without a fourth dimension. Just like it is hard to understand what a world would be like in 2d, or, like i said, 1d. Would the three dimensions even exist without time? Since time is the difference in events, it's hard to get your head around thinking about a world without it, which would be a 3d world.

I say that you wouldn't be able to move. By that i meant, if time were to cease to exist right now, nothing would be moving. You wouldn't think or act or anything. Why? Because time is the difference between events.

If time didn't exist all together, the big bang wouldn't have happened. Time wouldn't have started at all. We wouldn't exist. Time had to have started for things to start moving, because time is the difference between events.

I am going to give you the oxford dictionary of physics definition of 'time', then I will give you the definition of 'space-time', from the same book.



time A dimension (cough) that enables two otherwise identical events that occure at the same point in space to be distinguished. The interval between two such events forms the basis of time measurement.



There is a lot more to that definition, but that is all that is needed, since the rest is mostly a history lesson on Einstein, and a few other guys.



space-time A geometry that includes the three dimensions, and a fourth dimension of time. In Newtonian physics, space and time are considered as seperate entities and whether or not events are simultaneous is a matter that is regarded as obvious to any competent observer. In Einstein's concept of the physical universe, based on a system of geometry devised by H. Minkowski, space and time are regarded as entwined, so that two observers in relative motion could disagree regarding the simultaniety of distant events. In Minkowski's geometry, and event is identified by a world point in a four-dimensional continuum.



You have to think about time dilation for this to make sense. The faster you go, the slower time goes, for you. So, if you have an observer at rest, one moving slightly, and one moving a lot faster, and the two that are moving take measurements of eachothers time, and of the persons at rest, they will all get different results. Thus, time is defined by the difference in events. If time didn't exist, these events wouldn't take place.

Now, the reason why time is considered to be a dimension is partly because it's directly related to the space around it (space-time). Since the above is true, space affects time, and vice-versa, and therefore, time is mixed in with the dimensions of classic 'space' as the norm knows it to be, which is the three classic dimensions. However, time is also a spacious dimension that allows us to have differences in events in space-time.


Like i said, if time didn't exist, we wouldn't be able to move, if we were to exist. Some believe that you would be everywhere at once, which i think is silly, because space-time isn't only about being in a spot, it's about moving to the next spot, too. If time didn't exist, you woudln't be able to move to that next spot, and that space time wouldn't even exist.

So, explain to me how we could live in just a 3 dimensional world. That's what I want you to prove to me. Give me some thoughts on how we only live in a 3d world. We just have length, width and height. How can things exist with those three dimensions?

Last edited by taog; 11-08-2004 at 12:11 PM..
taog is offline  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360