Why is saturation current independent of frequency?

The saturation current depends on the intensity of light, not on frequency. Hence no matter how much is the frequency for the same intensity of light, the saturation photocurrent will be same.

Why the saturation current is independent of the anode potential for incident radiation of different frequencies but same intensity?

(i) In photoelectric emission from a given metal surface, the saturation current depends on the intensity of the incident radiation but is independent of the frequency of the incident radiation. Therefore, for the radiation of diff. intensity, the value of stopping potential will be the same.

Does saturation current depend on frequency?

At zero potential, the value of photoelectric current is higher for the photon whose frequency is greater than the other frequency of other photons. But the saturation current doesn’t depend on the frequency.

Why does current saturates in photoelectric effect?

The frequency and intensity of the incident light are kept constant. Saturation current implies that all the photoelectrons emitted by the emitter are immediately collected by the anode. …

Why saturation current is independent of the anode potential?

As light strikes the emitting electrode, electrons are ejected. But not all of the ejected electrons are collected at collecting electrode since they don’t get ejected in the same direction.

What is meant by saturation current?

Definition of saturation current : the limiting current through an ionized gas or an electron tube such that further increase of voltage produces no further increase in current.

How does saturation current varies with anode potential?

(i) Saturation current is same for incident radiations of different frequencies but of same intensity. It does not change with increase in anode potential.

Why does saturation current mean?

are the carrier lifetimes of holes and electrons, respectively. Since the minority charge carriers in the n-region and p-region are produced by thermally generated electron-hole pairs, these minority charge carriers are extremely temperature dependent and independent of the applied bias voltage. …

What is the relation between saturation current and intensity?

The saturation photoelectric current is proportional to the intensity of incident radiation, but it is frequency independent. As a result, when the intensity and frequency of the incident light are both doubled, the saturation photoelectric current is doubled.

How does photoelectric current vary of different intensities but same frequency of incident radiation?

(c) photoelectric current is directly proportional to number of emitted photoelectrons . and number of photoelectrons is directly proportional to the intensity of the incident radiation . that’s why photoelectric current varies for different intensities but same frequency of incident radiation .

Why do we use saturation current?

are the carrier lifetimes of holes and electrons, respectively. Increase in reverse bias does not allow the majority charge carriers to diffuse across the junction. However, this potential helps some minority charge carriers in crossing the junction.

What is saturation current in radiology?

The saturation current is measured by using the metal as a cathode of a vacuum tube and collecting the electrons on an anode which is sufficiently positive to dissipate the space charge. During this process the electron is deflected and emits a photon of x-radiation.