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How many electrons are emitted when calcium is flashed with light of wavelength 340 nm and intensity of 50 percent?
The number of electrons emitted when calcium is flashed with light of a certain wavelength and intensity depends on the photoelectric effect, which is related to the energy of the photons hitting the metal. Without the energy of the photons and the work function of calcium, we cannot determine the number of electrons emitted.
When does light emitted from a flame produced when electrons are in an excited state?
Light emitted from a flame occurs when electrons in atoms or molecules absorb energy and move to an excited state. When these electrons return to their lower energy levels, they release energy in the form of light. This process is known as the emission of photons, which produces the characteristic colors of the flame. The specific wavelengths of light emitted depend on the elements present in the flame and their unique energy level transitions.
What does the electron produce when they change energy levels?
When electrons change energy levels, they emit light or energy in the form of electromagnetic radiation. This emitted light can have specific frequencies or colors, depending on the difference in energy levels that the electron undergoes.
When a clean surface of potassium metal is exposed to blue light electrons are emitted if the intensity of the blue light is increased what will also increase?
i have the same question on my test haha for me, the answers are: a) The number of electrons ejected per second b) the maximum kinetic energy of the ejected electrons c) the threshold frequency of the ejected electrons d) the time lag between the absorption of blue light and the start of emission of the electrons e) none of these A the number of electrons ejected per second,,,,, correct answer
Light from a lit match comes from?
the combustion of the match head material, which releases energy in the form of heat and light. This light is a result of the incandescent particles emitted as the material burns and undergoes chemical reactions.
When a strontium compound is heated in a flame red light is produced When a barium compound is heated in a flame yellow-green light is produced Explain why these colors are emitted?
The red light from strontium compounds and yellow-green light from barium compounds are emitted due to the unique energy levels of electrons in these elements. When heated, electrons in strontium jump to higher energy levels and emit red light when they return to their original positions. In the case of barium, electrons jump to different energy levels and emit yellow-green light upon returning to their ground state.
What does light do in photoeletric effect?
In the photoelectric effect, light (photons) ejects electrons from a material's surface, creating an electric current. The energy of each photon must exceed the material's work function for electrons to be emitted. The intensity of light affects the number of electrons emitted, while the frequency determines the kinetic energy of the emitted electrons.
Will exposure to blue light cause electrons to be emitted from cesium?
Yes, exposure to blue light can cause the photoelectric effect in cesium, leading to the emission of electrons. Blue light has enough energy to overcome the work function of cesium, which allows electrons to be emitted from its surface.
How are electrons involved in light?
None, light is composed of photons. Light may be emitted or absorbed when electrons undergo transitions between atomic or molecular orbitals, but the light itself does not contain electrons.
How does the intensity of light affect the electrons emitted from a metal?
Increasing the intensity of light results in more photons hitting the metal surface, which can increase the number of electrons emitted through the photoelectric effect. This can lead to a higher current of ejected electrons being generated.
How many electrons are emitted when calcium is flashed with light of wavelength 340 nm and intensity of 50 percent?
The number of electrons emitted when calcium is flashed with light of a certain wavelength and intensity depends on the photoelectric effect, which is related to the energy of the photons hitting the metal. Without the energy of the photons and the work function of calcium, we cannot determine the number of electrons emitted.
What is photoelectronic?
when a light is shown on a material.Electrons emitted in this manner can be called photo-electrons
Will exposure to red light cause electrons to be emitted from cesium?
Yes, exposure to red light can cause the emission of electrons from cesium through the photoelectric effect. Red light carries enough energy to excite electrons in the cesium atoms, allowing them to overcome the binding energy and be emitted from the surface.
Why does barium burn green?
When barium burns, it releases energy in the form of light. The green color comes from the specific wavelength of light that is emitted as electrons transition energy levels within the barium atoms. This green light is typically associated with the presence of barium compounds in fireworks and pyrotechnic displays.
What device is known when electrons are emitted when light shines on a metal surface?
The device you are referring to is a photoelectric cell or a photodiode. When light shines on the metal surface of these devices, electrons are emitted in a process called the photoelectric effect, which generates an electric current.
When does light emitted from a flame produced when electrons are in an excited state?
Light emitted from a flame occurs when electrons in atoms or molecules absorb energy and move to an excited state. When these electrons return to their lower energy levels, they release energy in the form of light. This process is known as the emission of photons, which produces the characteristic colors of the flame. The specific wavelengths of light emitted depend on the elements present in the flame and their unique energy level transitions.
What is the relationship between the light emitted by an atom in the energies of the electrons in the atom?
The more energy levels the electron jumps the more energy the emitted light will have. The more energy you have the shorter wavelength there is.
