What is light?-Images from class notes

3 models of light:

Ray model:

Wave model:

Wave diffraction through a single slit

Laser light passed through a single slit

Laser light passing through a single and double slit- notice the gaps in the double slit- This occurs when light waves overlap and cancel each other out

Wave- Particle duality explained by Dr. Quantum (Don’t worry about the part regarding the “Quantum world”)

Photon or particle model:

Photoelectric effect

Light photons can knock electrons off and create an electric current

Higher energy photons can eject more electrons than lower energy photons

For the animation you saw in class:

Photoelectric Effect

Click to Run
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