Phys Vocab 9

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10 Terms

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Closed-pipe Resonator
A resonating tube with one end closed to air; its resonant frequencies are odd-numbered multiples of the fundamental.
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Concave Lens
Diverging it is thinner at its middle than at its edges, that spreads out light rays passing through it when surrounded by material with a lower index of refraction; produces a smaller, virtual, upright image.
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Concave Mirror
Reflects light from its inwardly curving surface and can produce either an upright, virtual image or an inverted, real image.
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Convex Lens
Usually made of glass, thicker at its center than at its edges, that refracts parallel light rays so the rays meet at a point when surrounded by material with a lower index of refraction; can produce a smaller, inverted, real image, or a larger, upright, virtual image.
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Convex Mirror
It reflects light from its outwardly curving surface and produces an upright, reduced, virtual image.
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Focal Point
The place where incident light rays that are parallel to the principal axis converge after reflecting from the mirror.
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Index of Refraction
For a medium, is the ratio of the speed of light in a vacuum to the speed of light in that medium.
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Open-pipe Resonator
A resonating tube with both ends open that also will resonate with a sound source; its resonant frequencies are whole-number multiples of the fundamental.
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Snell’s Law of Refraction
States that the product of the index of refraction of a medium and the sine of the angle of incidence equals the product of the index of refraction of a second medium and the sine of the angle of refraction.
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Total Internal Reflection
Occurs when light traveling through an area with a higher index of refraction to an area with a lower index of refraction hits a boundary at an angle that exceeds the critical angle and all light reflects back into the area with the higher index of refraction.