3. Wave Properties

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TAMU BMEN 311 - Imaging Living Systems [Wave Properties]

17 Terms

1

imaging techniques use

interactions between waves (notably EM or sound waves) and matter (such as glass and tissue)

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2

logitudinal waves

left to right

  • sound waves

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3

transverse waves

up to down (cosine waves)

  • x-ray & CT

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4

absorption

energy transerred into medium

<p>energy transerred into medium</p>
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5

emission

“Fluorescence” / glowing

<p>“Fluorescence” / glowing</p>
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6

transmission

light passes through medium or into a new medium

<p>light passes through medium or into a new medium</p>
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7

reflection

light bounces or changes direction when reaching a barrier

<p>light bounces or changes direction when reaching a barrier</p>
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8

specular reflection

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9

diffuse or scattering reflection

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10

refraction

lights bends when passing from one medium to another

due to change in speed of wave

<p>lights bends when passing from one medium to another</p><p><strong>due to change in speed of wave</strong></p>
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11

constructive wave interference

waves add thogether

<p>waves add thogether</p>
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12

destructive wave interference

waves subtract

<p>waves subtract</p>
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13

Refractive index

how much path is bent or “refracted”

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14

snell’s law

n1sin01=n2sin02

or

sin01/sin02 = v1/v2

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15

Diffraction

bending and spreading of wave as it passes through an opening or around barrier in its path

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16

small diffraction

wide gap

<p>wide gap</p>
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17

large diffraction

narrow gap

<p>narrow gap</p>
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