Does general relativity violate conservation of energy?
Does general relativity violate conservation of energy?
The energy of a photon is given by Planck’s constant times its frequency, so as the frequency decreases over time the energy also decreases. Since the number of photons themselves remains constant this means that energy is being lost and hence energy cannot be conserved in general relativity.
Does spacetime have energy?
The presence of matter and energy in space tells spacetime how to curve, and that curved spacetime tells matter and energy how to move. But there’s a free parameter as well: the zero-point energy of space, which enters General Relativity as a cosmological constant.
What is the conservation of momentum relationship to energy?
The laws of conservation of energy and momentum are among the most important and useful principles in physics. Conservation of momentum states that if a system of bodies has no net external forces acting on it, the total momentum is the same at all times (it is conserved).
Is energy conserved during stress?
Conservation law The stress–energy tensor is the conserved Noether current associated with spacetime translations.
Who said energy Cannot be created or destroyed?
This law, first proposed and tested by Émilie du Châtelet, means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.
Can we harness zero-point energy?
“The zero-point energy cannot be harnessed in the traditional sense. The idea of zero-point energy is that there is a finite, minimum amount of motion (more accurately, kinetic energy) in all matter, even at absolute zero. For example, chemical bonds continue to vibrate in predictable ways.
Is time a fluid?
Physicists have gathered evidence that space-time can behave like a fluid. Mathematical evidence, that is, but still evidence. If this relation isn’t a coincidence, then space-time – like a fluid – may have a substructure. We shouldn’t speak of space and time as if the two were distant cousins.
Can momentum be created or destroyed?
The conservation of momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton’s laws of motion.
What are the 3 laws of conservation?
The laws of conservation of energy, momentum, and angular momentum are all derived from classical mechanics.
Why is energy not always conserved?
Energy is “lost” to friction in the sense that it is not converted between potential and kinetic energy but rather into heat energy, which we cannot put back into the object. If we expand our system to include the entire universe, total energy is conserved, but mechanical energy is not.
Why is energy not conserved in expanding universe?
If your Universe were filled with radiation (photons), each quantum would have an energy, given by a wavelength, and as the Universe expands, that photon wavelength gets stretched. Sure, the photons are losing energy, but there is work being done on the Universe itself by everything with a pressure inside of it!
What theory says energy Cannot be created or destroyed?
The law of conservation of energy, also known as the first law of thermodynamics, states that the energy of a closed system must remain constant—it can neither increase nor decrease without interference from outside.
Does quantum mechanics violate conservation of energy?
First of all, if we do agree that the laws of quantum mechanics are time-translation invariant, then we do agree that quantum mechanics has conservation of energy at all times.
Can energy be created or destroyed Einstein?
“Energy cannot be created or destroyed; it can only be changed from one form to another.” (Albert Einstein). The world depends on energy to provide for all humankind activities.
What did Einstein mean when he said energy Cannot be created or destroyed?
The law of conservation of energy states that energy can neither be created nor destroyed – only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it’s added from the outside.
Can we harvest vacuum energy?
Because the vacuum state of the interacting theory is the state of least energy in reality, there is no way to extract the vacuum energy and use it for anything.
Is Casimir effect gravity?
Evidence that gravitational waves induce an attractive force between two closely spaced mirrors could confirm gravity’s quantum nature. Two mirrors placed a few nanometers apart in a vacuum experience an attractive force.
Why did Einstein say time is an illusion?
As For Einstein… As we saw from Einstein’s quote, he believed that time is an illusion, that both the future and the past are unchangeable, and will play out exactly the way they were meant to.
Why time is an illusion?
According to theoretical physicist Carlo Rovelli, time is an illusion: our naive perception of its flow doesn’t correspond to physical reality. Indeed, as Rovelli argues in The Order of Time, much more is illusory, including Isaac Newton’s picture of a universally ticking clock.
Is momentum neither created nor destroyed?
Is momentum and energy the same?
They are both related to an object’s velocity (or speed) and mass, but momentum is a vector quantity that describes the amount of mass in motion. Kinetic energy is a measure of an object’s energy from motion, and is a scalar. Sometimes people think momentum is the same as force.
Is energy ever lost or destroyed?
The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.
Why energy Cannot be created or destroyed?
Can energy actually be created or destroyed?
First Law of Thermodynamics: Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the Universe remains constant, merely changing from one form to another.
What is the Killing vector in general relativity?
Killing vector in General Relativity. In a static configuration, in which nothing changes with time, the time vector will be a Killing vector, and thus the Killing field will point in the direction of forward motion in time.
What is energy conservation in general relativity?
Energy conservation in General Relativity Just a system of gravitational waves. A point mass moving in a static (but otherwise arbitrary) space-time. Equivalent (if I’m not mistaken) to a test mass moving in the field of a second much larger mass, the larger mass wouldn’t move. Two rotating bodies of similar mass.
Is energy positive or negative in general relativity?
IThe physical concept of energy in General Relativity is subtle. It was not easy to discover the de\fnition of total energy. IGiven the de\fnition, to prove the positivity was remarkably dicult. IFrom the geometrical energy de\fnition, without the physical picture, it would be very hard even to conjecture that this quantity should be positive. 4/137
What is general relativity?
In addition, general relativity is the basis of cosmological models of an expanding universe . Widely acknowledged as a theory of extraordinary beauty, general relativity has often been described as the most beautiful of all existing physical theories.