Wave Optics
Flashcard
•
Science
•
9th Grade
•
Hard
Barbara White
Used 1+ times
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22 questions
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1.
FLASHCARD QUESTION
Front
Ray model Noun
[ray mod-l]
Back
Ray model
A model of waves that uses an arrow, called a ray, to represent the direction the wave is traveling.
Example: The ray model shows light traveling in straight lines called rays. This diagram shows a light ray from a source hitting a mirror and reflecting off it.
2.
FLASHCARD QUESTION
Front
Ray Noun
[ray]
Back
Ray
An arrow used in a wave model to represent the direction of wave travel, drawn perpendicular to the wave fronts.
Example: This diagram shows a ray as a straight line representing the path of light, which bends (refracts) when it passes from air into water.
3.
FLASHCARD QUESTION
Front
Huygens' wave model Noun
[hoy-genz wayv mod-l]
Back
Huygens' wave model
A model representing every point on a wave front as a source of semicircular wavelets that spread out forward.
Example: Each point on an incoming wave front acts as a source for tiny new wavelets, which together form the new reflected wave front.
4.
FLASHCARD QUESTION
Front
Wavelet Noun
[wayv-let]
Back
Wavelet
A small, semicircular wave that spreads out from a point on a wave front, as described by Huygens' principle.
Example: Each point on a wave's edge (old wavefront) creates a tiny new circular wave (a wavelet). All these wavelets combine to form the next wave's edge.
5.
FLASHCARD QUESTION
Front
Diffraction Noun
[dih-frak-shun]
Back
Diffraction
The bending and spreading of a wave as it passes around the edges of an opening or an obstacle.
Example: Sound waves bend as they pass through a doorway, allowing someone to hear around a corner. This bending of waves is called diffraction.
6.
FLASHCARD QUESTION
Front
Reflection Noun
[ri-flek-shun]
Back
Reflection
A phenomenon that occurs when a wave or object bounces off an interface or another object.
Example: This diagram shows parallel light rays hitting a smooth surface and bouncing off in a single, predictable direction, which demonstrates specular reflection.
7.
FLASHCARD QUESTION
Front
Normal line Noun
[nor-muhl line]
Back
Normal line
An imaginary line drawn perpendicular to a surface at the point where a ray of light strikes it.
Example: This diagram shows that the normal line is an imaginary line drawn perpendicular (at 90°) to a surface, like a mirror, at the exact point where a light ray hits.
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