By Michael D. Fayer

ISBN-10: 0814414915

ISBN-13: 9780814414910

Physics is a fancy, even daunting subject, however it can also be deeply enjoyable even exciting. And liberated from its mathematical underpinnings, physics unexpectedly turns into available to someone with the interest and mind's eye to discover its good looks. technological know-how with out math? It's no longer that strange. for instance, we will be able to comprehend the concept that of gravity with out fixing a unmarried equation. So for all those that can have contemplated what makes blueberries blue and strawberries crimson; should you have puzzled if sound fairly travels in waves; and why mild behaves so in a different way from the other phenomenon within the universe, it's all an issue of quantum physics. Absolutely Small provides (and demystifies) the realm of quantum technological know-how like no publication ahead of. It explores clinical strategies from debris of sunshine, to chance, to states of subject, to what makes greenhouse gases undesirable in enormous intensity, yet utilizing examples from the standard global. hard with no being intimidating, obtainable yet no longer condescending, Absolutely Small develops the reader's instinct for the very nature of items at their most simple and exciting degrees.

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Extra info for Absolutely Small: How Quantum Theory Explains Our Everyday World

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This distance is the difference between the total distance that the particle or wave or whatever it is has to travel if it is reflected from the bottom of the grating, and the distance that it has to travel if it is reflected from the top of the grating. That is, the waves which form the diffraction pattern are waves which come from different parts of the grating. The first ones that arrive come from the bottom end of the grating, from the beginning of the wave train, and the rest of them come from later parts of the wave train, coming from different parts of the grating, until the last one finally arrives, and that involves a point in the wave train a distance L behind the first point.

It is simply that if we have a finite train, we cannot count the waves in it very precisely. Let us try another way to see the reason for that. Suppose that we have a finite train of length L; then because of the way it has to decrease at the ends, as in Fig. 2-1, the number of waves in the length L is uncertain by something like ±1. But the number of waves in L is kL/2π. 7), a property merely of waves. The same thing works whether the waves are in space and k is the number of radians per centimeter and L is the length of the train, or the waves are in time and ω is the number of oscillations per second and T is the “length” in time that the wave train comes in.

So much for bullets. They come in lumps, and their probability of arrival shows no interference. 1-3 An experiment with waves Now we wish to consider an experiment with water waves. The apparatus is shown diagrammatically in Fig. 1-2. We have a shallow trough of water. A small object labeled the “wave source” is jiggled up and down by a motor and x x DETECTOR I1 I12 1 WAVE SOURCE I2 2 WALL ABSORBER I1 = |h1 |2 I2 = |h2 |2 (a) (b) I12 = |h1 + h2 |2 (c) Fig. 1-2. Interference experiment with water waves.

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Absolutely Small: How Quantum Theory Explains Our Everyday World by Michael D. Fayer


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