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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.
Why cesium and potassium used in photoelectric effect?
The ionization enthalpy of K and Cs is less than that of Li and therefore these metals easily lose electrons on exposure to light than lithium.That's the reason potassium and cesium are used in photoelectric cells rather than Cs.
What is the difference between turbidimetry and nephelometry?
Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering.In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured.In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam.
What is the correct title of the ICS organizational element that implements tactical activities to achieve the incident objectives?
The correct title is Operations Section. This section is responsible for developing and implementing the tactics to achieve the incident objectives as outlined in the Incident Action Plan.
What is the correct title of the ics organization element to which you are assigned You are implementing tactical activities to achieve the incident objectives?
The correct title would be Planning Section Chief. This role is responsible for overseeing the tactical activities within the Incident Command System (ICS) to achieve the incident objectives.
How does the light intensity affect the photoelectric current?
Increasing light intensity results in more photons being incident on the photoelectric material, leading to more electrons being ejected, thus increasing the photoelectric current.
What is the effect of intensity on photo electric current?
Increasing the intensity of light incident on a photoelectric material increases the number of photons hitting the material, which in turn increases the rate at which electrons are ejected from the material (photoelectric current). Consequently, higher light intensity leads to a higher photoelectric current.
Effect of intensity?
The photoelectric current is directly proportional to intensity.It also depends upon frequency, but frequency more than "THRESHOLD FREQUENCY" does not effect the current.The no. of electrons emitted per second by a photo-sensitive surface is directly proportional to the intensity of the incident radiations.So,the photoelectric current depends upon the intensity of the incident radiations.
When light is incident on a metal surface it emits electrons What happens if the intensity of light increases?
If the intensity of light increases, more photons will be incident on the metal surface, leading to a higher rate of electron emission through the photoelectric effect. This results in a higher current of emitted electrons.
What is the effect of frequency of incident light on photoelectric current?
The photoelectric effect is based on two principles. 1. The intensity or brightness of the visible light (number of photons): The higher the intensity (larger number of photons) determines the number of electrons that are released from the surface material. 2. The frequency of visible light (wavelength): The higher the frequency a beam of light has when it strikes the surface determines the speed (kinetic energy) of the electrons that are ejected from the material. This is independent from light intensity. The higher the frequency of the light, the higher the energy of the electrons emitted, and thus, the higher the current of the circuit.
What is the relationship between frequency and kinetic energy in photoelectric effect?
In the photoelectric effect, increasing the frequency of incident light increases the kinetic energy of the emitted electrons. This is because higher frequency light photons carry more energy, which can be transferred to the electrons during the photoelectric effect.
What is the frequency in photoelectric effect?
In the photoelectric effect, the frequency of incident light determines the energy of the ejected electrons from a material. Electrons are only emitted from the material when the frequency of the incident light is greater than the threshold frequency, which is unique to each material.
What does the slope of the graph of photoelectric current versus intensity signify in the photoelectric effect?
The current rises as does the intensity of light detected. The more light the greater the intensity, and the greater the current. The answer to the question is that photoelectric current displayed on a graph is shown as a slope that varies with the intensity of light. Someimes it can go up, sometimes it can go down.The ultimate answer is that the photoelectric effect is unreliable, but it is improving!
What is the order of photoelectric reaction?
The order of the photoelectric reaction is zero order because the rate of the reaction does not depend on the concentration of the reactants. The rate is solely determined by the intensity of the incident light.
What does light produce in a photoelectric effect?
In the photoelectric effect, light produces electrons when it strikes a material surface. The energy of the incident light is transferred to the electrons, causing them to be ejected from the material.
What is the difference between field emission and photoelectric emission?
* emisssion of electron from the surface of the metal when light of suitable frequency falls-photoelectric emission. * emision of electron from the metal by quantum tunnling of electron.
What is the relationship between absorbance intensity of incident radiation and intensity of transmitted radiation?
The relationship between absorbance intensity of incident radiation and intensity of transmitted radiation is inverse. As absorbance increases, transmitted intensity decreases. This is due to the absorption of light energy by the material, leading to a reduction in the amount of light passing through it.
