You will observe the particle properties of light and the photoelectric effect through a series of activities.
After completing this tutorial, you will be able to complete the following:
The atoms of metals are held together by electrons. When light of a specific frequency shines on a metal, it becomes heated. Albert Einstein developed the idea that light actually behaves as a solid particle. For this concept to be true, light must contain electrons. Therefore, Einstein concluded that the frequency of light that strikes a metal results in energy given off by the metal as a result of electrons being released. This is called the photoelectric effect. It is summarized by the equation hµ = KE + BE. KE is the kinetic energy of an electron lost by the metal. BE is the binding energy of the metal. Planck's constant is h, and µ is the frequency of light to which the metal is exposed.
|Approximate Time||30 Minutes|
|Pre-requisite Concepts||Learners should have working knowledge of electrons and the properties of light. They should also know how to read and interpret graphs.|
|Type of Tutorial||Concept Development|
|Key Vocabulary||ammeter, anode, binding energy|