Whats does state mean?
To state is to say something. State comes from the Latin status, meaning "condition of a country." Interestingly, even before the Revolutionary War, Britain called the American colonies states. The “States” still refers to America, but state can refer to any country's civil government.
What are the 52 states in the US?
The United States of America
Is state a country?
While the terms country, state, and nation are often used interchangeably, there is a difference. A State (note the capital "S") is a self-governing political entity. The term State can be used interchangeably with country. A nation, however, is a tightly-knit group of people which share a common culture.
What is normal state?
The normal state of a switch is that where it is unactuated. For process switches, this is the condition its in when sitting on a shelf, uninstalled. ... A switch that is closed when unactuated is called normally-closed. Sometimes the terms “normally-open” and “normally-closed” are abbreviated N.O. and N.C., respectively.
What is a state of mind examples?
Definition of state of mind. : a person's emotional state : mood He's in a bad/good state of mind.
What is another word for normal?
What is another word for normal?
What does excited state mean?
When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state. An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet, of light, or collides with a nearby atom or particle.
What is the first excited state?
The First Excited State(s) stands for singlet corresponding to the plus sign. Thus we have a large effective spin-spin interaction entirely due to electron repulsion. There is a large difference in energy between the singlet and triplet states.
Which excited state has a long life?
Metastable state, in physics and chemistry, particular excited state of an atom, nucleus, or other system that has a longer lifetime than the ordinary excited states and that generally has a shorter lifetime than the lowest, often stable, energy state, called the ground state.
How does an electron get excited?
When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state. An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle.
Can a photon turn into an electron?
A photon can spontaneously degenerate into a particle with mass and its antiparticle in a process known as pair production. In this process, the energy of the photon is completely transformed into the mass of the two particles. For example, a photon can turn into an electron and an anti-electron.
How much energy does it take to excite an electron?
If an electron is in the first energy level, it must have exactly -13.
Is a photon?
The photon (Greek: φῶς, phōs, light) is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
Is photon a quantum?
A photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light. ... This is commonly referred to as the speed of light, denoted by the letter c. As per Einstein's light quantum theory, photons have energy equal to their oscillation frequency times Planck's constant.
Does time exist for a photon?
Photons do not experience time. ... From the perspective of a photon, there is no such thing as time. It's emitted, and might exist for hundreds of trillions of years, but for the photon, there's zero time elapsed between when it's emitted and when it's absorbed again. It doesn't experience distance either.
Do photons die?
No, photons do not die. They are absorbed by the particles like an electron.
Can you stop a photon?
No, it is not possible to stop a photon. Photons are always moving. They have a constant total energy and kinetic energy of ( p c ). The rest mass of photons is always zero which means they have zero rest energy.
Can we see photon?
Yes. In fact, photons are the only things that humans can directly see. A photon is a bit of light. ... This happens when a photon enters the eye and is absorbed by one of the rod or cone cells that cover the retina on the inner back surface of the eye.
Can photons travel faster than light?
Science: Can photons travel 'faster than light'? LIGHT cannot travel faster than it does in a vacuum. ... The proposed effect, however, is very small indeed: the photons can exceed Einstein's limit by only one part in 1036.
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