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A photon is a bundle of electromagnetic energy. They move constantly at the speed of light in a free space, as they are the most basic unit of light. They are emitted from a atomic, molecular, or nuclear transition to a lower energy level.
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∙ 14y ago
Wiki User
∙ 11y agoEnergy is absorbed by atoms causing the electrons to 'jump' to an excited state.
When the electrons return to their 'ground' state or transition to any excited state less than when the energy was absorbed this energy difference in the 2 states is released as a photon.
Wiki User
∙ 7y agoAll light possess both particle-like and wave-light attributes. Unlike mechanical waves that require a medium, electromagnetic waves are able to propagate even within a vacuum. Electromagnetic waves are described in terms of frequency, energy or wavelength. While photons are particles that consist of careful packets of energy, they are able to travel through space due to the wave-light properties of light. Physics is still unable to answer many basic questions regarding the nature of light. The speed of light varies through different mediums because photons can be absorbed, attracted and reflected even though they have no rest mass or mass itself. Since there is no medium to interact with in space, light is able to travel at faster speeds than when it moves through atmosphere. Gravity is the only force that is able to alter the speed at which light travels through space. The strong gravitational attraction of massive objects, such as black holes, is able to slow the speed at which light moves and may even be able to keep light from traveling at all. In basic terms, photons move at the speed of light because they have no mass and because their atoms that have no mass are so slightly touched but at weighing no mass, the slighest touch of the atmosphere slowed down by the strength of gravity causes the protons to move at around 28,948,151,611.651 kilometres per hour! Therefore, moving light at the same speed and becoming, the speed of light!
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∙ 7y agoPhotoelectrons are emitted when light strikes a material.
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Why the speed of beta rays emitted by the same element are different?
because the control of neucles on different electrons is different and we know that beta rays are infact electrons then we can say that the speed of beta rays emitted by the same element is different
When one electron moves from the 4th shell to the 2nd shell in hydrogen is energy absorbed or emitted by the atom?
The energy is absorbed by the electrons because work needs to be done on the electrons to raise them to an excited state. Energy is stored in the electrons while they are in their excited state and would emit energy if they returned to their ground state.
Are the electrons of an atom affected by temperature?
Temperature definitely affects the electrons of an atom, if the temperature is high enough. That is why fires produce light; the light you see from a fire is emitted by excited electrons.
What are streams of electrons and protons that shoot out from the suns corona?
Streams of protons and electrons emitted from the Sun produce a solar wind. This is a source of energy has been shown in science fiction as a method to power interstellar travel, using solar sails.
What happens when the electrons relax?
As excited electrons drop back to lower energy levels in the atom, photons having the energy of the difference between the two electron energy levels are emitted from the atom.
What is photoelectronic?
when a light is shown on a material.Electrons emitted in this manner can be called photo-electrons
What is photo emissivity?
Emissivity of a surface is defined as its effectiveness in emitting thermal radiation. The term photo emissivity is likely used to narrow the focus to emitting visible light.
Electrons ejected in the photoelectric effect are called?
Photo electrons. So current due to these photo electrons is named as photo electric current.
Is the photocell convert light energy into electrical energy?
Yes. There are three types 1. photo emissive - here as light falls electrons are emitted 2. photo voltaic - here as light falls a voltage is developed 3. photo conductive - here conductivity changes as light falls on it
Streams of protons and electrons emitted from the Sun produce?
The stream of protons and electrons being emitted from the sun is called the solar wind.
When are the electrons emitted from a conductor?
>bombarded by high-speed electronsThat's like saying "water comes out of a pipe when water is poured into the pipe" Conductors don't EMIT electrons (any more than any material), but they allow electrons to flow freely within themselves. That is called a current.On that note, a current flows through a conductor when it is moved through a magnetic field. This is how generators work.Any material can be made to emit electrons by adding electrons to it. That's like saying a full cup will emit water if more water is added to it.ACTUALLY they are emitted. look it up.When it is heated hence those electrons are named as thermions and emission is known as thermionic emission.When light falls on it electrons are emitted. This phenomenon is known as photo electric emission.
Will exposure to red light cause electrons to be emitted from cesium?
No. It will not.
Will exposure to blue light cause electrons to be emitted from cesium?
No
Can an animal see electrons emitted by a cathode ray tube?
no
What are the Differences between thermionic emission and photoelectric emission?
Electrons would have enough energy to leave the metal surface, the hot cathode. However, without the forward voltage bias, positive anode. The vacuum diode could not conduct electricity. In other words, the initial kinetic energy of the emitted electrons can be ignored [0 J].Whereas, the photo-emitted electrons possess definite amount of initial kinetic energy.K.E. of e = hf - WorkFunctionSee, the initial k.e. is not neglectable.
What is the cathode ray is emitted from the negative electode called?
That would be electrons.
Is synchrotron radiation emitted perpendicular to the circular path of the electrons?
Yes, synchrotron radiation is emitted perpendicular to the circular path of the electrons. This is because the radiation is generated when the electrons are deflected, or accelerated, due to the magnetic field in the synchrotron. The emitted radiation is tangential to the circular path, resulting in a perpendicular radiation pattern.
