Web Analytics
Answered

Which statement best describes the light that will cause emission of electrons from a given metal through the photoelectric effect?


light with any intensity below a certain frequency

light with any intensity above a certain frequency

light with any frequency below a certain intensity

light with any frequency above a certain intensity

Verified Answer :

superman1987

The correct answer: (b) light with any intensity above a certain frequency

The explanation:

when Energy of a photon : E = hf

- The photoelectric effect works like this:

- If you shine light of high enough energy on to a metal, electrons will be emitted from the metal. Light below a certain threshold frequency, no matter how intense, will not cause any electrons to be emitted. Light above the threshold frequency, even if it's not very intense, will always cause electrons to be emitted.

Answer:

b

Explanation:

Related Questions