# About photoelectric effect and work function

• VHAHAHA
In summary, if the energy of a photon is less than the work function of a metal, no photoelectric effect is observed. However, the photon still has a chance of being absorbed and adding its energy to the metal, heating it up. This may cause confusion for some, but it simply means that the photon did not have enough energy to cause the photoelectric effect.
VHAHAHA
If the energy of the photon is less than the work function of the metal, no photoelectric is observed.
I would like to ask if the photon would be absorbed even if its energy is less than the work function? or the photon would not be absorbed?

The photon has a chance of being absorbed, yes. If it is absorbed and its energy is less than the work function then it simply adds its energy to the metal, heating it up.

Drakkith said:
The photon has a chance of being absorbed, yes. If it is absorbed and its energy is less than the work function then it simply adds its energy to the metal, heating it up.

thank you for ur help, this problem really bothers me a lot =D

VHAHAHA said:
thank you for ur help, this problem really bothers me a lot =D

## 1. What is the photoelectric effect?

The photoelectric effect is a phenomenon in which electrons are emitted from a material when it is exposed to light. This effect was first observed by Heinrich Hertz in 1887 and was later explained by Albert Einstein in 1905 through his theory of quantum mechanics.

## 2. What is the work function?

The work function is the minimum amount of energy required to remove an electron from the surface of a material. It is often denoted by the symbol Φ and is measured in electron volts (eV).

## 3. How does the intensity of light affect the photoelectric effect?

The intensity of light does not affect the photoelectric effect. Instead, it is the frequency of the light that determines the energy of the photons and therefore, the energy of the emitted electrons.

## 4. What is the significance of the photoelectric effect?

The photoelectric effect has several practical applications, such as in photoelectric cells used in solar panels, photomultiplier tubes used in particle detectors, and photoelectric sensors used in automatic doors and motion detectors. It also played a crucial role in the development of quantum mechanics.

## 5. Can the photoelectric effect be explained by classical physics?

No, the photoelectric effect cannot be explained by classical physics. Classical physics predicts that electrons should be emitted from a material regardless of the frequency of light, which is not observed in the photoelectric effect. It was only through Einstein's theory of quantum mechanics that the phenomenon was properly explained.

Replies
5
Views
878
Replies
0
Views
540
Replies
4
Views
982
Replies
1
Views
709
Replies
12
Views
1K
Replies
13
Views
1K
Replies
5
Views
2K
Replies
10
Views
2K
Replies
3
Views
2K
Replies
5
Views
1K