- Can an electron emit a photon?
- What elements are needed to recreate the star absorption?
- How do you tell if a photon is emitted or absorbed?
- Does a photon have mass?
- Do atoms absorb photons?
- Why does an electron emit a photon?
- Can a free electron emit a photon?
- Can photons hit each other?
- Can two photons annihilate?
- Does a photon ever die?
- Can a photon be seen?
- Can photons create matter?
- What happens when a hydrogen atom absorbs a photon of light?
- Can an electron absorb more than one photon?
- Which color has the highest energy?
- How does a photon get absorbed?
- What happens if an atom absorbs a photon?
- How does atomic structure change when a photon is absorbed?
Can an electron emit a photon?
When the electron changes levels, it decreases energy and the atom emits photons.
The photon is emitted with the electron moving from a higher energy level to a lower energy level.
The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level..
What elements are needed to recreate the star absorption?
A given atom will absorb and emit the SAME frequencies of electromagnetic (E-M) radiation. A gas of hydrogen atoms will produce an absorption line spectrum if it is between you (your telescope+spectrograph) and a continuum light source, and an emission line spectrum if viewed from a different angle.
How do you tell if a photon is emitted or absorbed?
The lines on the atomic spectrum relate to electron transitions between energy levels, if the electron drops an energy level a photon is released resulting in an emission line and if the electron absorbs a photon and rises an energy level an absorption line is observed on the spectrum.
Does a photon have mass?
Since photons (particles of light) have no mass, they must obey E = pc and therefore get all of their energy from their momentum. … But an object with zero energy and zero mass is nothing at all. Therefore, if an object with no mass is to physically exist, it can never be at rest. Such is the case with light.
Do atoms absorb photons?
Photon absorption by an atomic electron occurs in the photoelectric effect process, in which the photon loses its entire energy to an atomic electron which is in turn liberated from the atom. This process requires the incident photon to have an energy greater than the binding energy of an orbital electron.
Why does an electron emit a photon?
Electrons emit photons to shed energy. An atomically bound electron goes from shell to shell (around an atom) it requires a quanta of energy – a photon to be absorbed or emitted. This because it requires a certain energy level to occupy a particular shell. … An e-going down to a lower energy shell emits an photon.
Can a free electron emit a photon?
A free electron cannot absorb a photon as it is not possible to satisfy the energy and momentum conservation simultaneously. … In Compton effect we have both electron and a photon as the final product and it is then possible to conserved energy and momentum.
Can photons hit each other?
Since light itself does not have electric charge, one photon cannot directly interact with another photon. Instead, they just pass right through each other without being affected. … A photon can spontaneously degenerate into a particle with mass and its antiparticle in a process known as pair production.
Can two photons annihilate?
The answer is yes, photons may collide and produce other particles. One familiar reaction is the low-energy annihilation of an electron and an anti-electron (known as a positron)– the result is usually a pair of photons (sometimes you get more than two). … This happens all the time in particle physics experiments.
Does a photon ever die?
Physicists have found that particles of light, or photons, may live for at least 1 quintillion years, and if they can die, photons may give off very light particles that could travel faster than light.
Can a photon be seen?
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 create matter?
Thus, matter can be created out of two photons. The law of conservation of energy sets a minimum photon energy required for the creation of a pair of fermions: this threshold energy must be greater than the total rest energy of the fermions created.
What happens when a hydrogen atom absorbs a photon of light?
The electron can gain the energy it needs by absorbing light. If the electron jumps from the second energy level down to the first energy level, it must give off some energy by emitting light. The atom absorbs or emits light in discrete packets called photons, and each photon has a definite energy.
Can an electron absorb more than one photon?
The electrons can not absorb more than one photon to escape from the surface, they can not therefore absorb one quanta and then another to make up the required amount – it is as if they can only embrace one quantum at a time. If the quantum absorbed is not of sufficient energy the electron can not break free.
Which color has the highest energy?
Red waves have a relatively long wavelength (in the 700 nm range), and violet waves are much shorter – roughly half that. Because violet waves have the shortest wavelength of the visible light spectrum, they carry the most energy.
How does a photon get absorbed?
Photons get absorbed by the EM fields surrounding the molecules of the material of whatever receives its kinetic energy. The energy in the photon contributes to the degree of excitation of that EM field. Often, the EM field will return to its pre-photon absorbed level by emitting a photon of equal or lesser energy.
What happens if an atom absorbs a photon?
When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. … Electrons therefore have to jump around within the atom as they either gain or lose energy.
How does atomic structure change when a photon is absorbed?
The more atoms undergoing a particular transition, the more intense the emission line will be. The intensity depends on the density and temperature of the gas. An absorption line is produced when a photon of just the right energy is absorbed by an atom, kicking an electron to a higher energy orbit.