Photoelectric Theory Practise Flashcards
what is the wave theory in a nutshell?
How does Photoelectric theory challenge the wave theory?
well the problem is that the wave theory suggest the intensity of the (brightness) of the light should be enough to release electrons; regardless of its frequency. But that is not true in experimental observations.
What are the 2 findings that challenge the wave theory?
- Threshold frequency: First the photelectric effect showed that in order for a an electron to be emitted from the light should have enough energy(kick) to release an electron from material. Therefore, the frequency is the determining factor if a electron is emitted. (easy way to remember this is imagine the door in my room needs a certain amount of force to open.
- Instantaneous emission: The second challenge is that in the photoelectric effect once light hits a material, electrons are emitted right away without a noticeable delay. Unlike way theory that says there should be a buildup of energy before the electrons are released.
What did Scientist learn about the observations of the wave and photoelectric wave?
That light has a dual nature. Meaning it behaves as both a particle(photon) and a wave.
Photon define?
is a tiny particle or (packet) of energy that makes up light. Like a bundle of energy
What is the work function of a material?
Refers to the amount of energy required to remove an electron from the surface of that material. Basically, the minimum energy for it to happen.
How does the intensity of light affect the Photelectric affect?
The intensity of light does not directly impacts whether photoelectric affect occurs. However, the intensity of light can influence the number of electrons emitted by increasing the rate of electron ejection.
