No the known variables are only frequency , wavelength and Planck's constant and I have to find speed of light.BvU said:The template has "all variables and given/known data", but you have nothing there...
E = mc2 has to do with the total energy of an electron, moving or at rest. Is that what you have available as a known datum ?
BvU said:So your relevant equation should have been ##c = \lambda \; \nu ## ?
(##\nu## = frequency)[/QUO
Okay so I can calculate c by just measuring frequency and wavelength of a material .
The photoelectric effect is a phenomenon in which electrons are emitted from a material when it is exposed to light of a certain frequency. This effect was first discovered by physicist Albert Einstein in 1905.
The energy of the incident light is directly related to the kinetic energy of the emitted electrons in the photoelectric effect. The higher the energy of the light, the higher the kinetic energy of the emitted electrons.
The work function is the minimum amount of energy required to eject an electron from the surface of a material in the photoelectric effect. It varies depending on the type of material and is a characteristic property of that material.
The intensity of light does not affect the kinetic energy of the emitted electrons in the photoelectric effect. However, it does affect the number of electrons emitted, as a higher intensity of light means more photons are hitting the material, resulting in more electrons being ejected.
The type of material does affect the photoelectric effect, as different materials have different work functions and therefore require different amounts of energy to eject electrons. Additionally, some materials may have a higher or lower threshold frequency, which is the minimum frequency of light required to cause the photoelectric effect.