Energy is ALWAYS conserved.
The appropriate sum of mass and energy is always conserved. If an atom emits a photon, the atom has less energy/mass, and the universe minus that atom has more energy/mass. It's like carrying some energy from here to there.
2.96 x 10^-19 J
4.78 x 10-19
The amount of energy in a photon of light is proportional to the frequency of the corresponding light wave.... frequency of the electromagnetic radiation of which the photon is a particle.
When an electron absorbs a photon of light, it gains energy. This is quantized. When an electron gains energy, it moves to a higher energy level. Thus giving the equation hf=mcv. Therefore, as more energy is given to the electron, it gets 'excited' and maintains the energy by moving to a higher energy leve.
A particle of light. Or, in general, of an electromagnetic wave.
4.25 10-19 j
4.78 x 10-19
2.96 x 10^-19 J
2.96 x 10-19 J
it looses energy , it gives off light in the form of a single photon.
A packet of light energy is called a photon.
The energy is 2,9619.e-19 J.
The amount of energy in a photon of light is proportional to the frequency of the corresponding light wave.... frequency of the electromagnetic radiation of which the photon is a particle.
A quanta of light (one photon).
Just the opposite. As an electron returns to a lower energy level, it emits a packet (quantum) of energy that may be a visible photon.
When an electron absorbs a photon of light, it gains energy. This is quantized. When an electron gains energy, it moves to a higher energy level. Thus giving the equation hf=mcv. Therefore, as more energy is given to the electron, it gets 'excited' and maintains the energy by moving to a higher energy leve.
You may be confusing "proton" with "photon". A proton is a positively-charged particle contained within the nucleus of an atom. A photon is a discrete unit of energy normally expressed as light. Around the nucleus of the atom, there are some electrons in energy levels. When an atom absorbs energy, it absorbs a specific amount, or "quantum" of energy and the electron boosted to a higher energy level. When the electron drops to a lower energy level, it emits a photon in the form of light at a specific energy and frequency.