in compton scattering it is necessary that the energy of the photon should be very much greater than binding energy of electron .. binding energy is equal to work function of metal . in most of metals , the threshold frequency is equal to that of ultravoilet light .that is why we do not observe comption effect with visible light.
Photons propagating at frequencies in the visible light spectrum can knock out electrons from atoms, known as the photoelectric effect, if their energy is greater than the photoelectric work function for that atom. However, at the energies associated with the visible light frequencies, these new photoelectrons will absorb any excess energy of the initial photons and convert it to kinetic energy, meaning that the initial photons vanish. Obviously, if the photons are gone, they can't scatter. Increasing the intensity (brightening) of the photons will cause more electrons to be emitted, but it will not increase their energy since photon energy is a function of its frequency, not quantity.Photons that retain energy after interacting with an electron via the photoelectric effect are said to undergo Compton scattering. Now, despite what everyone says, if a photon has any amount of energy greater than the applicable photoelectric work function, it can theoretically undergo Compton scattering. Yes, I'm implying that visible light can Compton scatter. However, the probability of Compton scattering at these energies is very low, not to mention these scattered photons would most likely loose all of their energy from all of the other various available atomic interactions before they could even escape the sample, which is a necessary component to measurement (something has to exist in order to be measured). Therefore, the effects of Compton scattering are negligible at visible light energies. In fact, they don't really start becoming noticeable until around energies of 100keV, which is around 105 times greater than the energies associated with visible light. These kinds of energies are associated with x-rays.
Arthur Compton made significant contributions to the atomic theory by discovering the Compton effect, which provided experimental evidence for the particle nature of light. This discovery helped establish the understanding that light can behave as both a wave and a particle, which was fundamental to the development of quantum mechanics.
The Tyndall effect is the scattering of light by colloidal particles in a transparent medium. This phenomenon causes the particles to become visible as they scatter light, creating a visible beam of light passing through the medium. The Tyndall effect can be observed in systems such as smoke, fog, or colloidal solutions.
called Tyndall effect. It occurs when light passes through a medium containing small particles that scatter the light, making the beam visible. The scattered light is mainly due to the reflection and refraction of light by the particles in the medium.
The Tyndall effect is the scattering of light by particles in a colloid or suspension, making the light beam visible. In a salt solution, if the particles are small enough and evenly dispersed, they may not be large enough to scatter light significantly and produce a visible Tyndall effect. However, if there are larger particles present or the solution is more concentrated, the Tyndall effect may be observed.
photo electric effect,compton's effect
photo electric effect,compton's effect
Arthur Compton discovered the Compton effect, which demonstrates the particle-like behavior of light. This discovery provided evidence for the concept of photons and helped pave the way for the development of quantum mechanics.
Photons propagating at frequencies in the visible light spectrum can knock out electrons from atoms, known as the photoelectric effect, if their energy is greater than the photoelectric work function for that atom. However, at the energies associated with the visible light frequencies, these new photoelectrons will absorb any excess energy of the initial photons and convert it to kinetic energy, meaning that the initial photons vanish. Obviously, if the photons are gone, they can't scatter. Increasing the intensity (brightening) of the photons will cause more electrons to be emitted, but it will not increase their energy since photon energy is a function of its frequency, not quantity.Photons that retain energy after interacting with an electron via the photoelectric effect are said to undergo Compton scattering. Now, despite what everyone says, if a photon has any amount of energy greater than the applicable photoelectric work function, it can theoretically undergo Compton scattering. Yes, I'm implying that visible light can Compton scatter. However, the probability of Compton scattering at these energies is very low, not to mention these scattered photons would most likely loose all of their energy from all of the other various available atomic interactions before they could even escape the sample, which is a necessary component to measurement (something has to exist in order to be measured). Therefore, the effects of Compton scattering are negligible at visible light energies. In fact, they don't really start becoming noticeable until around energies of 100keV, which is around 105 times greater than the energies associated with visible light. These kinds of energies are associated with x-rays.
it have more energy than visible light
The particle nature of light was demonstrated through experiments like the photoelectric effect and the Compton effect. In the photoelectric effect, light shining on a metal surface causes the ejection of electrons, suggesting that light is made up of photons (particles). In the Compton effect, X-rays scattering off electrons result in a shift in wavelength, supporting the idea that light behaves as particles when interacting with matter.
The Nobel Prize in Physics 1927 was divided equally between Arthur Holly Compton for his discovery of the effect named after him and Charles Thomson Rees Wilson for his method of making the paths of electrically charged particles visible by condensation of vapour.
Maria Juranyi has written: 'Studies of the compton effect from the viewpoint of the ballistic theory of light'
The Compton effect involves the scattering of X-rays by electrons, resulting in a change in wavelength and energy of the X-rays. The photoelectric effect, on the other hand, involves the ejection of electrons from a material when it is exposed to light, without any change in wavelength. In terms of interactions with matter, the Compton effect involves interactions with free electrons, while the photoelectric effect involves interactions with bound electrons in atoms.
Arthur Compton made significant contributions to the atomic theory by discovering the Compton effect, which provided experimental evidence for the particle nature of light. This discovery helped establish the understanding that light can behave as both a wave and a particle, which was fundamental to the development of quantum mechanics.
The Compton effect supports the particle theory of light, as it demonstrates that photons (particles of light) can interact with matter like particles and exhibit particle-like behavior by transferring momentum to electrons during scattering. This is not consistent with the wave theory of light, which views light as a continuous wave rather than individual particles.
The Tyndall effect is the scattering of light by colloidal particles in a transparent medium. This phenomenon causes the particles to become visible as they scatter light, creating a visible beam of light passing through the medium. The Tyndall effect can be observed in systems such as smoke, fog, or colloidal solutions.