Question

what is photoelectric effect​

Answer 1

Explanation:

The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material. Electrons emitted in this manner are called photoelectrons. This phenomenon is commonly studied in electronic physics and in fields of chemistry such as quantum chemistry and electrochemistry.

Answer 2

Answer- The above question is from the chapter 'Structure of Atom'.

Given question: What is photoelectric effect?

Answer: PHOTOELECTRIC EFFECT:-

It was observed that electrons were ejected from the surface of some certain metals like: Rubidium (Rb), Cesium (Cs), Potassium (K), etc. when light (radiation) of suitable frequency is made incident upon them. This effect is called photoelectric effect.

Electrons that were ejected are called photo-electrons.

Additional information:

Features of the experiment:

1) Electrons were ejected immediately.

2) As the intensity or brightness of light increases, number of electrons increases.

3) For every metal, there is a minimum value of frequency of radiation to cause photoelectric effect. This is called Threshold Frequency ($\nu_{\circ}$).

The photoelectric effect can't be explained by wave nature of light.

(Refer to the attachment for diagram.)