Physics Optics Exam Questions with Latest Update

Isaac Newton said: - ANSWER-Light moves as tiny particles Huygens said: - ANSWER-Light is a wave Ray Model of Light - ANSWER-Light is represented as a ray (arrow) which travels in a straight line. The ray model was introduced as a way to study how light interacts with matter, regardless of whether light is a particle or a wave. Ray optics or geometric optics. Sources of Light - ANSWER-Luminous source (sun) produces own light. Illuminated source (moon) reflects light. Opaque - ANSWER-Does not allow light to pass through Translucent - ANSWER-Light passes through but objects not seen clearly Transparent - ANSWER-Light passes through and objects seen clearly Ole Roemer - ANSWER-Danish astronomer; first to first to determine that light travels with a measurable speed. Albert A. Michelson - ANSWER-1926: measured speed of light. For this work, be became the first American to receive the nobel prize in science. Speed of light - ANSWER-c = 3 × 10^8 m/s (precise enough) At this rate, light travels 9.46 × 10^12 km in a year. This is called a "light year" Light diffraction - ANSWER-Light bends around a barrier Light refraction - ANSWER-Light divides into colors, a property of waves (not particles). ROY G BIV Ray model of light - ANSWER-This assumes that light travels in straight-line paths called rays Geometric Optics - ANSWER-When we use the ray model of light to deal with optics (I think) The law of reflection - ANSWER-when the angle of incidence equals the angle of reflection