Question

light consisting of 2.7 e v photons is incident on a piece of sodium, which has a work function of 2.3 e v. what is the maximum kinetic energy of the ejected electrons? a. 2.3 e v b. 2.7 e v c. 5.0 e v d. 0.4 e v

Answer 1

The maximum kinetic energy of electrons ejected from sodium by 2.7 eV photons, with a work function of 2.3 eV, is 0.4 eV. Option d is the answer.

Step-by-step explanation:

The question deals with the photoelectric effect, which is a concept in physics. It asks for the calculation of the maximum kinetic energy of electrons ejected from sodium when it is irradiated with light consisting of 2.7 eV photons, given that the work function of sodium is 2.3 eV.

To find this, we use the equation KEe = Ephoton - W, where KEe is the kinetic energy of the ejected electron, Ephoton is the energy of the incoming photon, and W is the work function of the material.

Using the given values in the question: KEe = 2.7 eV - 2.3 eV = 0.4 eV.

Therefore, the correct answer is d. 0.4 eV, which represents the maximum kinetic energy of the ejected electrons.