Lecture 41   iq36

1. Light propagation through medium

o  micro- description superposition of fields – very complex

o macro-description: a light ray + wave fronts

2. Refraction phenomena

o Snell’s law

o Apparent depth

o Total reflection region. Fiber optics

o Snell’s law

3. Color dispersion

o Pair prisms, concepts of convergent and divergent rays

o Wave fronts in the convergent and divergent lenses.

Class announcement:

o The updated course summary of unit 4 has been posted with the date 4/21/13.

· Office hour today will be from 9:15 to 10:15. I will be available until 12:30. Let me know immediately after the class if you want to see me between 10:15 to 12:30 today.

· Mark your calendar: Review on unit4, 5-6 pm on Wed (May1). Location TBA.