0
Whereas, the photo-emitted electrons possess definite amount of initial kinetic energy.
K.E. of e = hf - WorkFunction
See, the initial k.e. is not neglectable.
What else can I help you with?
What is thermionic thermometer?
A thermionic thermometer uses the thermionic emission of electrons from a heated filament to measure temperature. When the temperature increases, the emission of electrons also increases, allowing for a correlation between temperature and electron emission. These thermometers are used in high-temperature applications and can provide fast response times.
What is the difference between field emission and photoelectric emission?
Field emission occurs when electrons are emitted from a surface due to a strong electric field, while photoelectric emission happens when electrons are emitted from a surface due to the absorption of photons. Field emission is primarily influenced by the local electric field strength, whereas photoelectric emission depends on the energy and intensity of incident photons.
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.
What is the time lag between the arrival of light at a metal surface and the emission of photoelectron?
The time lag between the arrival of light at a metal surface and the emission of a photoelectron is extremely short, typically on the order of a few femtoseconds (10^-15 seconds) to tens of femtoseconds. This process is known as the photoelectric effect, where electrons are emitted from a material when it absorbs photons with sufficient energy to overcome the material's work function.
What are the differences between Compton scattering and the photoelectric effect in terms of their interactions with matter?
Compton scattering and the photoelectric effect are both ways that X-rays interact with matter. The main difference is that in Compton scattering, X-rays collide with electrons in the material and lose energy, causing them to change direction. In the photoelectric effect, X-rays are absorbed by electrons in the material, causing them to be ejected from their atoms. This results in the X-rays losing all of their energy.
What is thermionic thermometer?
A thermionic thermometer uses the thermionic emission of electrons from a heated filament to measure temperature. When the temperature increases, the emission of electrons also increases, allowing for a correlation between temperature and electron emission. These thermometers are used in high-temperature applications and can provide fast response times.
What is the difference between field emission and photoelectric emission?
Field emission occurs when electrons are emitted from a surface due to a strong electric field, while photoelectric emission happens when electrons are emitted from a surface due to the absorption of photons. Field emission is primarily influenced by the local electric field strength, whereas photoelectric emission depends on the energy and intensity of incident photons.
What are the differences between thermionic emission and evaporation?
Thermionic emission is the process by which electrons are emitted from a heated metal surface, while evaporation is the process by which molecules in a liquid state gain enough energy to escape into the gas phase. Thermionic emission specifically involves the emission of electrons, whereas evaporation involves the transition of molecules from a liquid to a gas phase. Additionally, thermionic emission typically occurs at high temperatures, while evaporation can occur at a wide range of temperatures depending on the substance.
Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effect?
The light must consist of photons with energy equal to or greater than the work function of the metal to cause the emission of electrons through the photoelectric effect. The intensity of the light does not play a significant role in the emission of electrons, only the energy of individual photons matters.
How does the sensor control smoke detector?
The smoke detectors use the photoelectric effect or a sensor based on the ionization differences between smoke and air.
What are the differences between a photoelectric smoke alarm and an ionization smoke alarm?
The main difference between a photoelectric smoke alarm and an ionization smoke alarm is the way they detect smoke. Photoelectric alarms use light to detect smoke particles, while ionization alarms use radioactive particles. Photoelectric alarms are better at detecting smoldering fires, while ionization alarms are more sensitive to fast-flaming fires.
What are the differences between a photoelectric smoke detector and an ionization smoke detector?
The main difference between a photoelectric smoke detector and an ionization smoke detector is the way they detect smoke. Photoelectric detectors use a light beam to detect smoke particles, while ionization detectors use radioactive particles to detect smoke. Photoelectric detectors are better at detecting smoldering fires, while ionization detectors are more sensitive to fast-burning fires.
What are the differences between photoelectric and ionization smoke detectors?
Photoelectric smoke detectors use a light beam to detect smoke particles, while ionization smoke detectors use radioactive particles to detect smoke. Photoelectric detectors are better at detecting smoldering fires, while ionization detectors are more sensitive to fast-flaming fires.
What are the differences between ionization and photoelectric smoke detectors?
Ionization smoke detectors use a small amount of radioactive material to ionize the air, while photoelectric smoke detectors use a light beam to detect smoke particles. Ionization detectors are better at detecting fast-flaming fires, while photoelectric detectors are more sensitive to slow-smoldering fires.
What is the Difference between electrons and thermion?
free electrons drift away from atom's outermost shell because of loose force of attraction. but thermions are forced out of atom by heat energy. free electrons are responsible for flow of electricity whereas thermions are responsible for thermionic emission.
What is the difference between electrons and thermions?
free electrons drift away from atom's outermost shell because of loose force of attraction. but thermions are forced out of atom by heat energy. free electrons are responsible for flow of electricity whereas thermions are responsible for thermionic emission.
What are the differences between photoelectric and ionization smoke detectors in terms of their detection mechanisms and effectiveness in detecting smoke particles?
Photoelectric smoke detectors use a light beam to detect smoke particles, while ionization smoke detectors use radioactive particles. Photoelectric detectors are better at detecting smoldering fires, while ionization detectors are more sensitive to fast-flaming fires. Overall, photoelectric detectors are considered more effective in detecting smoke particles.
