Physics · Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations
Work function is
Work function is
- A. energy necessary to eject the electron from its orbit
- B. energy necessary to eject an electron from within a metal body
- C. minimum necessary energy to eject an electron from a metal surface
- D. wavelength necessary for releasing an electron from a body
Step-by-step solution
The work function is defined as the minimum energy required to remove an electron from the surface of a solid, typically a metal. It is a key concept in the photoelectric effect, where photons with energy greater than the work function can eject electrons. Option A describes ionization energy for an atom, not work function. Option B is imprecise because 'within a metal body' lacks surface specificity. Option D confuses wavelength (a property of light) with energy. Thus, option C is correct.
Related MCQs
- The photoelectric effect represent that…
- The electricity produced by creating photo electrons is called:…
- The difference in maximum kinetic energy of photoelectrons from the and from B…
- The incident photon involved in the photo-electric effect experiment…
- In photoelectric effect, the photocurrent…