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How can you demonstrate that a light bulb emits electrons by thermionic emission?
Wiki User
∙ 16y ago
Edison was said to have noted this emission when a wire paralleling a light bulb filament showed current flow if the filament was more negaive than the wire, but not if the filament was more positive than the wire. Note that the wire is not touching the filament. The wire was inside the bulb with the filament. First Edison lit the bulb with a simple battery circuit. Then the wire was connected to a current meter and other terminal of the current meter to a second battery and the other end of the second battery to either end of the first battery. Depending on which way the second battery is set, the ammeter indicates an electric current flowing through the wire or not.
Wiki User
∙ 16y ago
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What happens to atoms and their electrons while the entity emits light?
The electrons of the atom move closer to the nucleus while the atom emits light.
What is the process in which an electron returns to a lower energy level and emits a photon?
line emission
What spectum is obtained When any element in the gas phase is excited to the point where it emits visible light?
When any element is excited to the point where it emits visible light, it emits a unique spectrum. The mercury in a florescent lamp emits a spectrum in the ultraviolet spectrum. It excites phosphorus powder on the inside of the bulb. The ultraviolet rays strike the phosphorus and it emits white light. Sodium emits yellow light. Potassium emits purple light. Sodium actually emits two different yellows. Each element emits several different colors.The above is not wrong, but it doesn't really answer the question. I believe the answer the poster was looking for is emission spectrum.You may be correct. I have no intention of giving the emission spectrum of every element. I only wished to help the questioner understand what happens when an emission spectrum is produced. I had the idea that the questioner had the idea that every element produced the same emission spectrum. We interpreted the question differently.
When electromagnetic radiation above the threshold frequency falls on an object it emits electrons?
Hhn
Mg emits radiation at 285nm could a spectroscope be used to detect this emission?
285nm is ultraviolet, and I think with a spectroscope you actually look with your eye to see the emission - you would not be able to see this wavelength. If you put some kind of a film that reacts to UV light in the spectroscope, you could then "see" it as a mark on the film.
Principle of Spontaneous emission and stimulated emission?
How the nucleus emits radiations spontaneously?
What is the verb form of the word emission?
The verb form is to emit (emits, emitting, emitted); an emission is something that is emitted.
How Positron emission tomography work?
A tracer courses through the bloodstream to the target organ, where it emits positrons. The positively charged positrons collide with negatively charged electrons, producing gamma rays.
What happens to atoms and their electrons while the entity emits light?
The electrons of the atom move closer to the nucleus while the atom emits light.
Is the Hg emission spectrum continuous or discrete?
Hg emission is discrete, that's why you can only see certain (discrete) frequencies, as excited electrons fall from one level to another. A heated light bulb, on the other hand, emits a continuous spectrum from all of its variously vibrating charges.
What is smoke belcher?
A vehicle that emits high air pollutants; did not pass the national emission standard. The term originated from the Philippines.
What is the process in which an electron returns to a lower energy level and emits a photon?
line emission
What spectum is obtained When any element in the gas phase is excited to the point where it emits visible light?
When any element is excited to the point where it emits visible light, it emits a unique spectrum. The mercury in a florescent lamp emits a spectrum in the ultraviolet spectrum. It excites phosphorus powder on the inside of the bulb. The ultraviolet rays strike the phosphorus and it emits white light. Sodium emits yellow light. Potassium emits purple light. Sodium actually emits two different yellows. Each element emits several different colors.The above is not wrong, but it doesn't really answer the question. I believe the answer the poster was looking for is emission spectrum.You may be correct. I have no intention of giving the emission spectrum of every element. I only wished to help the questioner understand what happens when an emission spectrum is produced. I had the idea that the questioner had the idea that every element produced the same emission spectrum. We interpreted the question differently.
How are gamma rays readable by photomultiplier-scintillator combinations produced by positron emission tomography?
the tracer courses through the bloodstream to the target organ, where it emits positrons. The positively charged positrons collide with negatively charged electrons,
Conductor in a battery that collects or emits electrons?
zinc
Conducor in a battery that collects or emits electrons?
In a battery, or voltaic pile, the negative terminal or wire, called the anode, emits electrons in an electrical circuit. The other terminal, called the cathode, collects electrons in an electrical circuit.
What is the conductor in a battery that collects or emits electrons called?
Zinc
