Practice Test: Physics Vocab Ch. 29-31

Matching skip

Short Answer skip

1. In refraction: when speed increases in the new medium
   
2. Law of Reflection
   
3. focal plane
   
4. Index of refraction
   
5. objects behind focal points of converging lenses
   

Multiple Choice skip

1. polished surfaces
   1. any bending of a wave by means other than reflection or refraction
   2. line joining centers of curvature
   3. 1. Parallel to principal axis passes through focal point after refraction. 2. ray through center goes straight. 3. ray through focal point in front of lens emerges parallel to principal axis
   4. 1/o + 1/i = 1/f. o = object distance, i = image distance, f = focal length
   5. causes reflection for certain waves
2. total internal reflection
   1. distance between center of the lens and focal point
   2. some energy goes to new medium and some reflected
   3. ray reflected off medium
   4. the 100% reflection (with no transmission) of light that strikes a boundary between 2 media at an angle greater than the critical angle
   5. line joining centers of curvature
3. dispersion
   1. image seen through wider angle through lens. Converging lens can only magnify when object is between focal point and lens. image is virtual
   2. everything reflects
   3. light waves out of phase
   4. separation of light into colors arranged according to frequency
   5. ray reflected off medium
4. converging lens
   1. 1/o + 1/i = 1/f. o = object distance, i = image distance, f = focal length
   2. distance between center of the lens and focal point
   3. light waves in phase (laser)
   4. Ratio of n of the speed of light in a vacuum / speed of light in a material. (n = c/v)
   5. bend rays to converge at single point
5. totally reflected
   1. everything reflects
   2. 1. ray parallel to principal axis bent in same direction as if it came from focal point. 2. through center goes straight. 3. ray headed to focal point on far side bends so emerges parallel
   3. diagrams of refraction, lines that represent positions of different crests
   4. light of a single frequency
   5. any bending of a wave by means other than reflection or refraction

True or False skip

1. Young's experiment
   Monochromatic light through 2 pinholes, creates fringes of darkness and light on screen due to constructive and destructive interference

   True   False

2. reflection
   wave reaches a boundary between two media, some or all the wave bounces back into the first medium

   True   False

3. Huygens' Principal
   every point on any wave front can be regarded as a new point source of secondary waves

   True   False

4. reflected ray
   ray reflected off medium

   True   False

5. diffuse reflection
   light is incidence on a rough surface and is reflected in many directions

   True   False