# What is the threshold frequency of photoelectric?

## What is the threshold frequency of photoelectric?

The threshold frequency for photoelectric emission of electrons from platinum is 1.3×1015s−1. .

## What is the threshold frequency for photoelectric emission from a metal?

Threshold frequency of a certain metal for photo – electric emission is 5 × 10^14 Hz.

What is the threshold frequency for the photoelectric effect of silver?

The photoelectric threshold frequency of silver is 1.04×1015Hz.

### What is the threshold frequency of a material?

The threshold frequency is the frequency of light that carries enough energy to dislodge an electron from an atom. This energy is entirely consumed in the process (see References 5). Therefore, the electron gets no kinetic energy at the threshold frequency and it is not released from the atom.

### Why is threshold frequency necessary for photoelectric effect?

If the frequency of the light was higher (green light, for example), then electrons were able to be ejected from the metal surface even if the intensity of the light was very low or it was shone for only a short time. This minimum frequency needed to cause electron ejection is referred to as the threshold frequency.

What is threshold frequency and law of photoelectric effect?

The three laws of the photoelectric effect are as follows; 1) The emission of electrons from the surface stops after a certain frequency known as the threshold frequency. 2) The number of electrons that are emitted from the surface is directly proportional to the intensity of the incident light.

#### How do you find threshold frequency?

f = W/h where h is planck’s constant. Therefore if we know the work fucntion we can work out the threshold frequency but don’t forget to convert 3eV into J. 1eV = 1.6 x 10^{-19} J.

#### What is threshold wavelength in photoelectric effect?

Threshold wavelength: Threshold wavelength is the maximum wavelength that the incident radiation must have so that the photoelectric effect takes place. The Work function is defined as the minimum energy needed to remove an electron from the solid to a point in vacuum immediately outside the surface of the solid.

What is threshold frequency and threshold wavelength?

Threshold frequency is the minimum frequency of the light required to remove an electron out of a metal. Since wavelength of light is inversely proportional to its frequency, the threshold wavelength is the maximum wavelength of the light for which the metal will emit electrons.

## How do you find the frequency of a photoelectric effect?

This metal has a work function of 2.14 eV. Use Photoelectric Effect Formula to find the energy of the electrons that eject. Thus frequency, \nu = \frac{1}{ 400 \times 10^{-9}} = 2.5 \times 10^{6} Hz.

## What is threshold frequency and work function in photoelectric effect?

Threshold Frequency: The threshold frequency is that minimum frequency of light below which the photoelectrons do not emit. Work function: The least energy which can eject the electrons from the surface of the metal.

What is threshold wavelength frequency?

### How to explain threshold frequency of photoelectric effect?

To explain threshold frequency we can write the equation for photoelectric effect as: Here W is the work function of the metal. It is the minimum energy that needs to be supplied to the metal body for the emission of photoelectrons. Now W can be written as:

### What is the formula of threshold frequency of metals?

The formula of threshold frequency is W= hv 0. Here v 0 is the photoelectric threshold frequency of the electromagnetic light rays, W is the work function of the metal body. There is no term like the threshold frequency of metals because threshold frequency is the characteristics of the electromagnetic radiations and not the metal surface.

What is the photoelectric effect?

The emission of electrons with help of electromagnetic radiations like light from the surface of a photoelectric material is called the photoelectric effect. The electrons emitted are known as photoelectrons.