OUTCOME
By the end of this lesson you will be able to examine the results of Lenard's experiment to show that light could not be a wave but is acting in packets like a particle. You will be able to describe and explain the evidence that challenged the Wave theory of light.
The results of the photoelectric effect and its explanation by Einstein challenged the wave theory of light (in this vid. frequency is expressed with the symbol v )
Robert Millikan measured planck's constant to significant accuracy earning him the Nobel prize which was used to develop the idea of quanta and what we know today as quantum mechanics
LEARNING TASKS
Explain
Why does the particle model support this mechanism rather than a wave model
Explore and Elaborate
Evaluate
Ex 11.4
Create a table of observations of light that can be explained by the wave model or particle model
Observation
Wave model prediction
Particle model prediction