The emission of electrons from the surface of a metal because of incident light is called as photoelectric effect (PEE). According to Law of Photoelectric Effect; when the energy of the incident light is absorbed by valence electrons of the metal, electrons emitted with sufficient energy from the surface of the metal. As per classical Maxwell wave theory of light, as the intensity of light increases; energy of incident light also increases hence greater the energy with which the electrons should be ejected from the metal.
Therefore with increment in the intensity of incident light; we can increase the average energy carried by an ejected or photoelectric) electron. But practically; that is not happening. Hence the energies of the emitted electrons are not depending on the intensity of the incident radiation.
In 1905; Einstein resolved this paradox by proposing the concept of individual quanta also known as photons which are carried by incident light.
These photons interacted with the valence electrons in the metal like discrete particles instead of continuous waves.
The relation between frequency and energy can be written as;
E = hf
Hence as the intensity of light increases; it increases the number of incident photons per unit time that is called as flux but the energy of each photon remains same. This effect of ejection of electrons from metal surface is one of the most direct and convincing evidence of the existence of photons and the 'corpuscular' nature of light.
It also provides evidence of the quantization of the electromagnetic field and overcome the limitations of the classical field equations. Overall electromagnetic radiation can push electrons free from the surface of a solid and this is called as PEE and that material which can exhibited this effect is known as photo-emissive.
These ejected electrons are called as photoelectrons. This effect is not occurring below the threshold frequency of incident light. This frequency varies from material to material. For most elements; this is related to the ultraviolet region of the electromagnetic spectrum. The kinetic energy of photoelectrons can determine by measuring the stopping potential.
You can find many Applications of the Photoelectric Effect such as in photo cell. It is the most ranging of Applications of Photoelectric Effect which is most commonly found in solar panels. It based on the basic principle of light striking the cathode and causes the emission of electrons which produces a current.
You can observe many Uses of the Photoelectric Effect in your daily life. This effect is basis of photosynthesis, a process of solar cell. In this the sunlight is absorbed by plants to make them grow. You can also see Uses of Photoelectric Effect in telecommunications networks, imaging, light detection within fibre optics etc.
Understanding Faraday Law is always challenging for me but thanks to all math help websites to help me out.
Therefore with increment in the intensity of incident light; we can increase the average energy carried by an ejected or photoelectric) electron. But practically; that is not happening. Hence the energies of the emitted electrons are not depending on the intensity of the incident radiation.
In 1905; Einstein resolved this paradox by proposing the concept of individual quanta also known as photons which are carried by incident light.
These photons interacted with the valence electrons in the metal like discrete particles instead of continuous waves.
The relation between frequency and energy can be written as;
E = hf
Hence as the intensity of light increases; it increases the number of incident photons per unit time that is called as flux but the energy of each photon remains same. This effect of ejection of electrons from metal surface is one of the most direct and convincing evidence of the existence of photons and the 'corpuscular' nature of light.
It also provides evidence of the quantization of the electromagnetic field and overcome the limitations of the classical field equations. Overall electromagnetic radiation can push electrons free from the surface of a solid and this is called as PEE and that material which can exhibited this effect is known as photo-emissive.
These ejected electrons are called as photoelectrons. This effect is not occurring below the threshold frequency of incident light. This frequency varies from material to material. For most elements; this is related to the ultraviolet region of the electromagnetic spectrum. The kinetic energy of photoelectrons can determine by measuring the stopping potential.
You can find many Applications of the Photoelectric Effect such as in photo cell. It is the most ranging of Applications of Photoelectric Effect which is most commonly found in solar panels. It based on the basic principle of light striking the cathode and causes the emission of electrons which produces a current.
You can observe many Uses of the Photoelectric Effect in your daily life. This effect is basis of photosynthesis, a process of solar cell. In this the sunlight is absorbed by plants to make them grow. You can also see Uses of Photoelectric Effect in telecommunications networks, imaging, light detection within fibre optics etc.
Understanding Faraday Law is always challenging for me but thanks to all math help websites to help me out.