# How to calculate threshold frequency?

#### Understand the Problem

The question is asking how to determine the threshold frequency, which is the minimum frequency needed to eject electrons from a material in the photoelectric effect. This involves understanding the relationship between frequency and the work function of the material.

#### Answer

Divide the work function by Planck's constant

The final answer is obtained by dividing the work function by Planck's constant.

##### Answer for screen readers

The final answer is obtained by dividing the work function by Planck's constant.

#### More Information

The work function (W) is the minimum energy needed to eject an electron from a material. By dividing it by Planck's constant, you get the threshold frequency, which is the minimum frequency of incoming light needed to eject electrons.

#### Tips

A common mistake is forgetting to ensure the units of the work function and Planck's constant are consistent, which can lead to incorrect calculations.