John D. Barrow: Quotes about laws

John D. Barrow was British scientist. Explore interesting quotes on law.
John D. Barrow: 116   quotes 1   like

“The laws of Nature are based upon the existence of a pattern,”

John D. Barrow

The Artful Universe (1995)
Context: The laws of Nature are based upon the existence of a pattern, linking one state of affairs to another; and where there is pattern, there is symmetry. Yet... the symmetries that the laws enshrine are broken in... outcomes. Suppose that we balance a needle on its point and then release it. The law of gravity, which governs its subsequent motion, is perfectly democratic. It has no preference for any particular direction in the Universe: it is symmetrical in this respect. Yet, when the needle falls, it must fall in a particular direction. The directional symmetry of the underlying law is broken, therefore... By the same token, the fallen needle hides the symmetry of the law... Such 'symmetry-breaking' governs much of what we see in the Universe... It allows a Universe governed by a small number of symmetrical laws to manifest an infinite diversity of complex, asymmetrical states. This is how the Universe can be at once, simple and complicated.<!-- Ch. 2, pp. 36-37

Law , Nature

“What had stopped them both in their tracks was Gamow's suggestion that the laws of physics could describe something being created out of nothing.”

John D. Barrow

The Book of Universes: Exploring the Limits of the Cosmos (2011)
Context: Einstein had spent the previous thirty years showing how we could understand the behaviour of whole universes with simple maths. Gamow saw that those universes must have had a past that was unimaginably different to the present. What had stopped them both in their tracks was Gamow's suggestion that the laws of physics could describe something being created out of nothing.<!--ch. 1, p. 2

Law

“Each of the most basic physical laws that we know corresponds to some invariance, which in turn is equivalent to a collection of changes which form a symmetry group. …whilst leaving some underlying theme unchanged. …for example, the conservation of energy is equivalent to the invariance of the laws of motion with respect to translations backwards or forwards in time… the conservation of linear momentum is equivalent to the invariance of the laws of motion with respect to the position of your laboratory in space, and the conservation of angular momentum to an invariance with respect to directional orientation… discovery of conservation laws indicated that Nature possessed built-in sustaining principles which prevented the world from just ceasing to be. There were fewer roles for the Deity to play…”

John D. Barrow

New Theories of Everything (2007)

World , Law , Nature , Change

“Einstein showed us how to find all the possible universes that were consistent with the laws of physics and the character of gravity, how to reconstruct their pasts and predict their futures. But actually finding them was no easy task.”

John D. Barrow

Preface
The Book of Universes: Exploring the Limits of the Cosmos (2011)

Law , Universe , Past , Future

“Even today, there persists… a feeling that the creation of the Universe out of nothing must violate some basic conservation law that stops one from getting something for nothing. Nevertheless, there is actually no evidence that the Universe as a whole possesses a non-zero value of any such conserved quantity. The total mass-energy of all the constituents of a finite Universe appears to be always equal in magnitude but opposite in sign to the total gravitational potential energies of those particles. …Similarly, there is no evidence that the Universe possesses any overall net rotation or electric charge.”

John D. Barrow

New Theories of Everything (2007)

Law , Feeling , Universe , Appearance

“Assuming the simulators, or at least the early generations of them, have a very advanced knowledge of the laws of Nature, it's likely that they would still have incomplete knowledge of them. …gradually the little flaws will begin to build up. …The only escape is if their creatures intervene to patch up the problems one by one as they arise.”

John D. Barrow

"Glitch," New Scientist (June 7, 2003)

Law , Nature , Knowledge , Problem

“Hundreds of years ago, natural theologians tried to impress their readers with stories of the wondrous symmetries of Nature; now we see that, ironically, it is the departures from those symmetries that makes life possible. It is upon the flaws of Nature, not the laws of Nature, that the possibility of our existence hinges. …The laws and constants of Nature are features that enforce uniformity and simplicity, while initial conditions and symmetry breakings permit complexity and diversity.”

John D. Barrow

The Artful Universe (1995)

Life , Law , Departure , Nature

“…logical contradictions will inevitably arise and the laws of the simulations will appear to break down now and again. The inhabitants of the simulation—especially the simulated scientists—will occasionally be puzzled by the experimental results they obtain. The simulated astronomers, might, for instance, make observations that show that their so-called constants of Nature are very slowly changing.”

John D. Barrow

"Glitch," New Scientist (June 7, 2003)

Law , Nature , Appearance , Change

“Gods reappear in unlimited numbers in the guise of the simulators who have the power of life and death over the simulated realities that they bring into being. The simulators determine the laws, and can change the laws, that govern their worlds. They can engineer anthropic fine-tunings. They can pull the plug on the simulation at any moment, intervene or distance themselves from their simulation; watch as the simulated creatures argue about whether there is a god who controls or intervenes, work miracles or impose their ethical principles upon the simulated reality.”

John D. Barrow

"Glitch," New Scientist (June 7, 2003)

Life , Death , God , World