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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.
What else can I help you with?
What happens to atoms and their electrons while the entity emits light?
When atoms emit light, their electrons move to lower energy levels, releasing the excess energy in the form of photons. The photons emitted have a specific wavelength corresponding to the energy difference between the initial and final electron levels. This process is known as emission of light or photon 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 a electron returns to its stable or ground state is emits?
When an electron returns to its stable or ground state, it emits a photon of light. This process is known as emission and is responsible for various forms of light emission including fluorescence, phosphorescence, and luminescence. The energy of the emitted photon is equivalent to the energy difference between the higher energy state and the lower stable state of the electron.
When electromagnetic radiation above the threshold frequency falls on an object it emits electrons?
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How is the light of an emission spectrum of an element produced?
Basically, energy is emitted when an electron falls from a higher energy level to a lower energy level. Such energy is emitted as electromagnetic waves, which in certain cases can be visible light.
Does a incandescent light bulb emit electrons by thermionic emission?
No, incandescent light bulbs do not emit electrons by thermionic emission. Instead, they produce light by heating a filament to such a high temperature that it emits visible light due to incandescence. Thermionic emission typically refers to the emission of electrons from a heated cathode in vacuum tubes or electron guns.
Why filament is needed in CRO?
A filament is needed in a Cathode Ray Oscilloscope (CRO) to emit electrons in the cathode-ray tube. The electrons are accelerated towards the screen to create the electron beam, which is then deflected to produce the display. The filament heats up and emits electrons through thermionic emission, contributing to the functioning of the CRO.
What happens to atoms and their electrons while the entity emits light?
When atoms emit light, their electrons move to lower energy levels, releasing the excess energy in the form of photons. The photons emitted have a specific wavelength corresponding to the energy difference between the initial and final electron levels. This process is known as emission of light or photon emission.
How do the emission spectra for hydrogen and helium differ from each other?
The emission spectra for hydrogen and helium differ in the specific wavelengths of light they emit. Hydrogen emits light in distinct lines corresponding to transitions of its electrons between energy levels, while helium emits a continuous spectrum of light.
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.
What are the functions of hot filament in physics?
In physics, a hot filament is used in devices like incandescent light bulbs to generate light through the process of thermal radiation. The filament heats up when an electric current passes through it, causing it to emit visible light. This is based on the principle of blackbody radiation, where a hot object emits electromagnetic radiation.
In the milky way the most abundant gas in emission nebulae is?
The most abundant gas in emission nebulae in the Milky Way is hydrogen. Emission nebulae are commonly made up of ionized hydrogen gas that emits light as it recombines with electrons. This creates the vibrant pink and red colors often seen in these nebulae.
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 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.
What is smoke belcher?
A vehicle that emits high air pollutants; did not pass the national emission standard. The term originated from the Philippines.
When light is incident on a metal surface it emits electrons What happens if the intensity of light increases?
If the intensity of light increases, more photons will be incident on the metal surface, leading to a higher rate of electron emission through the photoelectric effect. This results in a higher current of emitted electrons.
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,
