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Photons create electrons in two senses. In the first sense, they don't really create electrons but eject them: from a surface in the photo-electric effect or from atoms or molecules in photo-ionization. Observing the photo-electric effect was a key part of discovering quantum mechanics.
In the second sense, an electron is created together with its anti-particle, a positron, when the photon collides with another particle. Particle-antiparticle creation requires a lot more energy than "photo-ejection". This is conversion of energy into matter, in this case matter with a rest mass of just over a million electronvolts (in mass-equivalent units according to Einstein's E=mc^2). So the photon (and target particle) need to have kinetic energy of that amount for electron-positron pairs to be created.
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Are photons smaller than electrons?
Yes, photons are smaller than electrons. Photons are elementary particles that have no mass and are considered to be point-like particles, while electrons have mass and are considered to be fundamental particles with a measurable size.
Which three subatomic particles are the lightest?
The three lightest subatomic particles are electrons, neutrinos, and photons. Electrons and neutrinos have very small masses, while photons are massless.
What are the differences between the photoelectric effect and the Compton effect in terms of their interactions with matter and the behavior of photons?
The photoelectric effect involves the ejection of electrons from a material when photons of sufficient energy are absorbed, while the Compton effect involves the scattering of photons by free electrons in a material, resulting in a change in the photon's wavelength. In the photoelectric effect, photons interact with electrons in the material, leading to the ejection of electrons, while in the Compton effect, photons collide with free electrons, causing them to scatter and change direction.
What are the steps when a rod is excited by photons of light?
When a rod is excited by photons of light, the photons are absorbed by the atoms in the rod, causing the electrons in the atoms to jump to higher energy levels. This results in the electrons becoming excited. As the excited electrons return to their lower energy states, they emit photons of light at specific wavelengths, a process known as fluorescence or luminescence.
What are the differences between the photoelectric effect and Compton scattering in terms of their interactions with photons and electrons?
The photoelectric effect involves the ejection of electrons from a material when it absorbs photons, while Compton scattering is the process where photons collide with electrons, causing them to change direction and lose energy. The key difference is that in the photoelectric effect, electrons are ejected from the material, while in Compton scattering, electrons remain within the material but change their direction and energy.
Do photons conduct electricity?
No. Electricity is the movement of electrons, and photons have no electrons to move. Photons are the gauge particles for the electromagnetic force, but that's a different concept.
What is formed by the movement of electrons?
Electricity is formed by the movement of electrons. When electrons flow through a conductor, they create an electric current that can be harnessed and used to power electrical devices.
Are photons smaller than electrons?
Yes, photons are smaller than electrons. Photons are elementary particles that have no mass and are considered to be point-like particles, while electrons have mass and are considered to be fundamental particles with a measurable size.
Which subatomic particle of the atom in a molecule interacts with photons?
Electrons are the subatomic particles in an atom that interact with photons. When photons interact with electrons, they can be absorbed, emitted, or scattered, leading to various chemical and physical processes in a molecule.
How do electrons gain in energy in photosystem 1?
they absorb photons from sunlight
Why electrons are used for the excitation in the argon ion lasers though light travels faster than the electron?
High energy electrons are much easier to create than high energy photons.
Which three subatomic particles are the lightest?
The three lightest subatomic particles are electrons, neutrinos, and photons. Electrons and neutrinos have very small masses, while photons are massless.
What are the differences between the photoelectric effect and the Compton effect in terms of their interactions with matter and the behavior of photons?
The photoelectric effect involves the ejection of electrons from a material when photons of sufficient energy are absorbed, while the Compton effect involves the scattering of photons by free electrons in a material, resulting in a change in the photon's wavelength. In the photoelectric effect, photons interact with electrons in the material, leading to the ejection of electrons, while in the Compton effect, photons collide with free electrons, causing them to scatter and change direction.
What are the steps when a rod is excited by photons of light?
When a rod is excited by photons of light, the photons are absorbed by the atoms in the rod, causing the electrons in the atoms to jump to higher energy levels. This results in the electrons becoming excited. As the excited electrons return to their lower energy states, they emit photons of light at specific wavelengths, a process known as fluorescence or luminescence.
What is the difference between photons and electrons?
Photons have no charge, no rest mass and travel at the speed of light throuh a vacuum. Electrons have a charge of -1, have rest mass and are part of atoms.
What is the Difference between electrons and photons?
Photons have no charge, no rest mass and travel at the speed of light throuh a vacuum. Electrons have a charge of -1, have rest mass and are part of atoms.
Light microscopes use beams of electrons to produce magnified images?
No, a light microscope uses focused light (photons) to produce a magnified image. An electron microscope uses beams of electrons to create a magnified image.
