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Across
2.Descibes the behavior of waves as the pass from one medium to another. Waves will change speed, either slowing up or slowing down, causing a corresponding change in wavelength. With 2-D or 3-D waves, if the waves do not approach the medium in a "head-on" way, part of the wave will change speed before another part and the wave will change its direction of motion (propagation).
5.The reproduction of an object formed with lenses or mirrors
6.An angstrom is 1/100,000,000 of a centimeter
11.A lens that is thinner in the middle than at the edges; used to correct nearsightedness
15.In a compressional (logitudinal) wave, it's the part of the wave that is squeezed together
17.The point that all light rays from a mirror or lens pass through
18.The straight surface of a plane wave, crest or trough. A plane wave moves in a direction that is perpendicular to the wavefronts
21.A screen that allows only certain colors to pass through it; a transparent material that
22.A series of repeating nodes and anti-nodes that form when two or more waves contiunously overlap. This happens for many reasons, a few of which are: waves passing through two small openings, placing two identical sources near each other, and creating standing waves.
28.A wave is a moving disturbance that carries energy along with it
31.The angle between a reflected wave and the normal to the barrier from which it is reflected
32.In a compressional (logitudinal) wave, it's the part of the wave that is "stretched out".
33.The rate at which waves are produced by a source. The frequency of produced waves does not change regardless or medium unless the source itself changes. In a particular medium, changes in wave frequency cause inverse changes in wavelength. For example an increase in frequency will cause the resulting waves to have a smaller wavelength.
35.A region of a standing wave or interference pattern where the waves are always destructively interfering with each other.
36.A single disturbance made in a medium. This is not a full wave because it consists of a half-vibration: either a single crest or compression but no trough or rarefaction
37.A region of a standing wave or interference pattern where the waves constructively interfere causing large positive and negative oscillations
38.A wave pattern that occurs when a wave reflects back on itself. When the waves have the right frequency the medium continuosly vibrates but the waves do not appear to move along or propagate through the medium. Nodesand Anti-Nodeswill appear along the standing wave.
Down
1.Rule for determining how a wave will reflect. It states that that the reflected angle of wave motion should equal the incident angle of wave motion. These angles are mesured by comparing the direction of wave motion to an imaginary line drwan perpendiclarly (normal) to the reflecting suface.
3.The angle between a wave striking a barrier and the line perpendicular to the surface
4.A situation where waves curve or spread-out as they pass through an opening or move around a barrier
7.The material through which a physical or mechanical wave travels. The medium is the sole factor that determines the velocity that a wave has while in that medium. Light waves do not require a medium.
8.High-energy wave of high frequency and with a wavelength shorter than an x ray; released
9.The overlapping or collision of two or more waves. Waves move through each other, but while they overlap they can make a larger disturbance if their amplitudes are the same (constructive interference) or will make a smaller disturbance if their amplitudes (destructive interference).
10.The rate at which an object moves. In other words, how far an object moves in a given amount of time (usually meters/sec in physics). Wave velocity is the rate that waves propagate through a medium and is affected by the medium. You can measure the velocity of waves by measuring how far a waves moves and dividing this by the time the wave takes to move that distance
12.Transverse radiant energy waves, ranging from low frequency to very high frequency,
13.A piece of transparent or reflecting material, which contains many thousands of parallel
14.The amount that a wave disturbs the medium from it's normal state. The greater the disturbance, the greater the corresponding amount of energy
16.A lens that is thicker in the middle than at the edges; used to correct farsightedness
19.The distance between waves. This is usually measured by determining the distance between two identical regions ( crest to crest or trough to trough). Wavelength is affected by the velocity of waves and the frequency of the source producing waves. If velocity and frequency are known, wavelength can be found by dividing Velocity by Frequency
20.A wave that does not have to travel through matter in order to transfer energy
21.The distance between the principal focus of a lens or mirror and its optical center
23.The part of a transverse wave that extends below (negative) the rest state of the medium.
24.A primary light color—red, blue, or green; these three colors produce white light when
25.A kind of wave where the medium is disturbed in a direction that is perpendicular to the direction the wave is moving (propagating).
26.A phenomenon that occurs when waves strike barriers or other media. In the case of barriers, waves will "bounce" off of the barrier in a direction that is constent with the Law of Reflection. In the case of a change in medium, some of the wave reflects while the rest moves into the new medium (see refraction).
27.A type of wave where the disturbance is created in the same plane as the direction of wave motion (propagation).
29.The direction of motion of a wave though a medium. One dimensional (for example a slinky) waves propagate in a straight line. Two dimensional waves may propagate in a straight line (plane waves) or in all directions on a surface (circular waves on a pond/ ripple/tank). Three dimensional waves can propagate in all directions (like a light bulb illuminating a room).
30.Anything that vibrates to create waves
34.In a transverse wave, this is the part of the wave that rises "above" (positive) the rest state of the medium.

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