OPTI 200 Lecture 1: OPTI-200,University of Arizona,Textbook Readings(p1)

• School: University of Arizona
• Department: Optical Sciences
• Course: OPTI 200
• Professor: ALL

Document Summary

Powers of ten notation 10^3 = 1000. Light goes from the source (sun, light bulb) to the object (book etc. ), bounces off or travels through he object and tot he detector (eye) Sometimes light goes directly to the eye from these sources, or self luminous objects like t. v. In the vacuum of space, a beam that is not directed at the observer canon be seen at all. When light falls on ordinary objects, some of it is redirected (scattered) and you can only see an object if it scatters the light. Light travels in straight lines, unless it hits some object and changes direction. Light does take time to get one place to another. C, fundamental constant of the velocity of light in a vacuum 300,000 km/sec. Speed is the same for all different colors of lights. Light does not need a medium to travel through, it can travel through a vacuum.