Lesson 9 Flashcards Preview

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Flashcards in Lesson 9 Deck (12)
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1
Q

What does a large impedance between 2 medias produce?

A

A large IRC

2
Q

What does perpendicular incidence depend on?

A

Acoustic impedance mismatch

- delta z

3
Q

Oblique incidence

A

Sound beam hits the surface on an angle

4
Q

What kind of transmission will oblique incidence have?

A

Either smaller or larger

5
Q

What does it mean when the transmission are the same?

A

That the 2 mediums are the same, which results in same propagation speed

6
Q

What 3 things will a single pulse have?

A
  1. Incident pulse
  2. Reflective pulse
  3. Transmitted pulse
7
Q

What are 3 angle measurements to consider?

A
  1. Angle of incidence
  2. Angle of reflection
  3. Angle of transmission
8
Q

Whats does transmitted angle change based on?

A

Propagation speed

- c

9
Q

What is the change of propagation speed referred to as?

A

Refraction

10
Q

What is the relationship with the angles if c1

A

Angle i < angle t

11
Q

What is the relationship with the angles if c1>c2?

A

Angle i > angle t

12
Q

What happens to an object in water when light gets refracted?

A

The object appears to be bigger

  • lateral position error
  • duplication of aorta