By Lawrence Krauss
An exploration of mankind’s fascination with worlds past our own—by the bestselling writer of The Physics of celebrity Trek
Lawrence Krauss —an overseas chief in physics and cosmology—examines our lengthy and ardent romance with parallel universes, veiled dimensions, and areas of being that can expand tantalizingly past the bounds of our notion. Krauss examines well known culture’s present embody (and common false impression) of such subject matters as black holes, lifestyles in different dimensions, strings, and a few of the extra impressive new theories that suggest the lifestyles of huge additional dimensions along our personal.
Read or Download Hiding in the Mirror: The Quest for Alternate Realities, from Plato to String Theory (by way of Alicein Wonderland, Einstein, and The Twilight Zone) PDF
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Extra info for Hiding in the Mirror: The Quest for Alternate Realities, from Plato to String Theory (by way of Alicein Wonderland, Einstein, and The Twilight Zone)
Example text
Since distance traveled is determined by the speed of the light ray times the time it travels, this observer thus finds d = ct. Any other observer moving with respect to this observer may in general measure a different length d ' and time t ', but they must find d ' = ct ' if they are to determine the same speed relative to them for this light ray. Thus, at least for a light ray, different observers in relative motion will measure distances and times such that the combination d 2 − c 2t 2 = d '2 − c 2t '2 = 0 for any light ray.
For, if the speed of light can be calculated from fundamental constants that can be measured in a laboratory, and if observers in laboratories moving at a constant velocity with respect to each other should observe the same results as observers in laboratories at rest, then this would imply something remarkable. Since all such observers should measure the same fundamental constants of nature, in terms of which they could each calculate the speed of light rays that they would measure in their laboratories, then all observers, regardless of their state of motion with respect to an ether background, should measure the same speed of light.
A fourth dimension had been discovered, but not the one that Abbott had imagined. But people most often hear what they want to hear, and consequently they often tend to interpret THE FOURTH DIMENSION 47 the new results of science in terms that justify their previous expectations. ” But Einstein was not yet finished with space and time. CHAPTER 5 DISTURBING THE UNIVERSE What is derived from experience has only comparative universality, namely, that which is obtained through induction. We should therefore only be able to say that, so far as hitherto observed, no space has been found which has more than three dimensions.
