If such content is taught to kids entire syllabus even an idiot will get good marks and good job in science field.... But i have seen no one have done the job for a entire syllabus.... Such kind of fantastic videos are present only in fragments only for some topics
In this video, the spontaneous emission is explained. Coherent light is created by a laser using a technique called stimulated emission. But in the spontaneous emission, an electron undergoing a transition in an atom will spontaneously emit a photon as light. Spontaneous emission occurs without interacting with other photons, and the direction and phase are random. Because of this, the total power the bunch radiates is only N times that of a single electron. Since this type of spontaneous radiation is statistical, the fields lack a clear phase, and the emission is incoherent.
Can you make a laser beam from sun light if the sun light is collected to a feed horn from a dish mirror and transported to a laser cavity where a laser beam of a specific color is made? It could be useful in stone carving where electricity generated laser light would make the finished product very expensive.
If an atom is illuminated with an incoming photon with the exact same energy as the transition that would occur spontaneously when in the excited state, the atom may be driven to return to the lower state and simultaneously produce a photon with the same transition energy. When a single photon interacts with an excited atom, it can result in the emission of two photons.
How can you have three electrons in the same orbit? (As shown in your animation 3:25) That is wrong? Pauli Principle can allow no more than two electrons per orbit.
If an electron is illuminated with an incoming photon with the exact same energy as the transition that would occur spontaneously when in the excited state, the atom may be driven to return to the lower state and simultaneously produce a photon with the same transition energy. When a single photon interacts with an excited electron, it can result in the emission of two photons. These two photons again interact with other electrons present in the excited state. Thus, more photons are released during the emission process.
Hi, pls find your query answered - 1. Metastable state has a longer lifetime than the ordinary excited states. Metastable may happen naturally or artificially. For example, a metastable state can be readily obtained in a crystal system containing impurity atoms. 2. Theoretically, every element has a metastable state. In particular, in lasers, we are using xenon or helium because they have very high excitation energy.👍
The electrons present in the atom absorb the energy from its surroundings and move to a higher energy level that is excited state from its ground state. This process is known as absorption. After a particular time period, the electrons losing their energy in the form of photons. When you excite copper atoms, the emission occurs as the electron returns to a lower-energy state. This emission takes the form of visible, green light
In this video, we have explained under the topic, spontaneous emission. In an excited state, an electron can release energy and 'fall' to a lower state. When this happens, the electron emits a photon of electromagnetic energy. When an electron returns to its ground state, it can no longer emit energy but can absorb quanta of energy and progress to excitation states.
No metastable state doesn't exist before the excitation of an electron. Initially, the electron is excited to a short-lived high-energy state, which then spontaneously descends to a slightly lower-energy state, known as a metastable state, with an unusually long life.
I don't know whether i am right or not..but what i think is as follows... let's say the electron is in E1 state.. it'll stay there for a moment so kinda stable...so to make it emit photons, we provide it with more photons which makes him, as you say, go to another excited state E2 which is definitely of higher energy. As we know, higher the energy, lesser the stability so it becomes unstable and instantly jumps back emitting photons. I don't know whether it's right or not...you better Google it
In this video, we have explained that the electron does not remain in an excited state for long, and it quickly returns to the ground states. When this happens, a photon with the same energy as the difference in the energy level between the excited and ground states is emitted.
A laser medium, also known as a laser-active medium, gain medium, or lasing medium, is the material used to generate laser emission (stimulated emission). The atoms in the laser medium must also be "pumped" into higher energy levels.
I think energy difference is in quanta.so according to the energy eq it is directly proportional to frequency.for those frequencies which are very less in visible region is not but red.so i think almost all lasers emit red colour.
A stable subatomic particle with a negative electrical charge is known as an electron. Electrons, unlike protons and neutrons, are not made up of even smaller components. When compared to a neutron or proton mass, each electron carries one unit of negative charge (1.602 x 10-19 coulomb) and has a very little mass.
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