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How does an electron must move in order to release a photon of light?
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In what way does the photoelectric effect support the particle theory of light?
In order for an electron to be ejected from a metal surface, the electron must be struck by a photon with at least the minimum energy needed to knock the electron loose.
What happens when an electron in a higher electron cloud drops to a lower energy cloud?
It gains energy in a quantized amount
What happens when electrons change levels?
Energy is either absorbed or released. If the electron goes from a high energy orbital to a lower energy one, a photon is emitted. When a photon is absorbed, the electron goes from low energy to high.
How do you find wavelength if you've been given the energy?
The easiest way would be to find a descriptive article on the internet that shows the visible colors spread out with some wavelengths labeled. There, you can find the approximate wavelengths for light of various colors. If you don't know the color of the light, then in order to find its wavelength, you'd need to know either its frequency or the energy of a photon (quantum). Energy of a photon = h f h = Planck's Konstant = about 6.63 x 10-34 joule-second f = frequency of the light wave or photon But the frequency is (speed of light)/(wavelength) so, Energy = h c/wavelength . If you know either the energy of the photon or its frequency, you can use this stuff to find its wavelength. In this discussion, I've toggled back and forth a few times between the frequency/wavelength of the quantum and the frequency/wavelength of the light wave. Don't worry. They're the same.
When does emission of light occur from an atom?
When an electron is excited by some form of energy it enters into a higher orbital. In order for there to be balance it almost immediately returns to the previous orbital. When such happens energy is released in the form of light.
In what way does the photoelectric effect support the particle theory of light?
In order for an electron to be ejected from a metal surface, the electron must be struck by a photon with at least the minimum energy needed to knock the electron loose.
What must happen to the electron in order for an atom to emit light?
The atom must be subjected to a form of energy which propels the electron(s) to a higher energy level. When the electrons return to their resting state they emit one photon of light at a certain wavelength that our eyes interpret as a color.
Is light emitted when an electron makes a transition to a lower energy level?
No, as energy is absorbed. When the reverse happens, the higher state to lower state, the electron is returning to its lower energy level ground state and energy is released in the form of a photon.
When does lighting occur?
Light is actually photon particles that stem from many different physical processes. For example the sun emits light through radiation stemming from its hot surface. This light is being emitted in order to "cool" the sun. Other forms of light stem purely from electron de-excitation, in which a characteristic light particle is emitted from an atom as an electron in an outer electron state (higher energy) returns to a inner electron state (lower energy).
What happens when an electron in a higher electron cloud drops to a lower energy cloud?
It gains energy in a quantized amount
Can two photons interact with an electron simultaneously?
Yes. This effect is called "two-photon absorption" or "two-photon stimulated emission" and is described by the second order term in quantum-mechanics perturbation theory.
What must an electron do to move from ground state to an excited state?
To move an electron from the ground state to an excited state, it requires an input of energy. It should be equal to the energy difference between the two levels. This energy comes from collision with other molecules and atoms.
What state does an electron move to its ground state from in a gaseous atom in order for a photon to be emitted?
In a transition to ground state, a photon is radiated away. It carries off the energy to make a transition to ground state possible. As soon as it is created, the photon is off to the races. It travels away at the speed of light (for the medium in which it is moving).
Why is energy released when electrons are repositioned closer to a nucleus?
The electron loses energy in order to go from an "excited" shell back to its "original" shell. This releases energy in the form of a photon - an xray.
Why does the color of the light source determine whether the photoelectric effect will occur?
it doesn't matter how bright the light is in order to break free the electrons from the substrate but the kind of colour used is very important.This is because electron will start to move when light is up close to the blue end of the spectrum.
What happens when an electron moves from a lower energy level to a higher energy level?
When an electron moves from a higher to a lower energy level, it releases a quantum of energy, which is what it had to absorb in order to make the jump in the first place. This quantum of energy is often released in the form of a photon, which is a discrete amount of light of a certain wavelength. Billions and billions of photons can be visible to the eye, and this is how things like glow sticks and neon lights work.
Can atoms be seen by a microscope?
No. to viewing a phenomenon you need to send light (photon) to it and then see reflected light( photon) as the atom particles (electron,neutron,proton) are in order of photon, your sent light changes their conditions and you see none
