The work function of the substance is 6.2 * 10 ^ -19J. Does the photoelectric arise under
| June 15, 2021 | education
The work function of the substance is 6.2 * 10 ^ -19J. Does the photoelectric arise under the action of radiation having a wavelength of 0.42 microns?
The photon energy is calculated by the formula:
E = h * c / (lambda).
E = (6.626 * 10 ^ (- 34) x 3 * 10 ^ 2) / 0.42 = 4.7 * 10 ^ (- 25 J
Compare energies: 4.7 * 10 ^ (- 25) <6.2 * 10 ^ (- 19)
Answer: the energy of the photons will be less than the work function, so the photoelectric effect cannot occur.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
