TH 2190 Study Guide - Midterm Guide: Cyc, Sealed Beam, Light Plot
Document Summary
Name and define the qualities of light: intensity, color, direction, texture/ pattern (often falls under movement, movement (physical and perceived) Name the parts of a light based on a picture. Atomic theory: protons: positive charge, electrons: negative charge, electricity and magnetism go hand in hand (movement of electrons from the poles create electricity) A/c vs. d/c: in direct current (dc), the electric charge (current) only flows in one direction, electric charge in alternating current (ac) changes direction periodically. Ac is used to deliver power to houses, office buildings, etc. , as it is often chosen as the primary means to transmit electricity over long distances. Watts = voltage x ampere: can also be written as power = intensity x energy, wattage the amount of work a circuit is capable of doing, voltage potential energy (similar to water pressure) A us outlet has 110 to 120 volts.
