Polarization
When light is reflected at Brewster’s angle from a smooth surface, it is 100% polarized parallel to the surface. Part of the light will be refracted into the surface. Describe how you would do an experiment to determine the polarization of the refracted light. What direction would you expect the polarization to have and would you expect it to be 100%.
Lectures 8 nd Dynamics KINEMATICS describes “how” things move, DYNAMICS describes “why” things move Unbalanced Force causes motion to c hange (Δv ) Force → a physical uantity escribing how hard and in what direction acceleration is moving (push or pull) Requires an agent a nd object Is a vector Contact Force Physically touches o bject The agent is exactly what is in contact with the object Long Range Force Not touching (gravity is the only one worked with in this class) Gravitational Force Planet is th gent Vertically downward a cceleration Works on all objects (moving or at rest) F G = mass 9.8 Spring Force Push or pull Spring is the agent, can be anything that bends a little, even a board of wood Contact force Tension Force, T Agent is rope or something pulling Direction is along he agent Molecular spring trying to return o equilibrium Contact force VERY IMPORTANT → AGENT IS ALWAYS WHAT IS TOUCHING THE OBJECT Normal Force, n Normal to o b
