Lesson 9

Question 1

What does a large impedance between 2 medias produce?

Answer 1

A large IRC

Question 2

What does perpendicular incidence depend on?

Answer 2

Acoustic impedance mismatch

- delta z

Question 3

Oblique incidence

Answer 3

Sound beam hits the surface on an angle

Question 4

What kind of transmission will oblique incidence have?

Answer 4

Either smaller or larger

Question 5

What does it mean when the transmission are the same?

Answer 5

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

Question 6

What 3 things will a single pulse have?

Answer 6

1. Incident pulse
2. Reflective pulse
3. Transmitted pulse

Question 7

What are 3 angle measurements to consider?

Answer 7

1. Angle of incidence
2. Angle of reflection
3. Angle of transmission

Question 8

Whats does transmitted angle change based on?

Answer 8

Propagation speed

- c

Question 9

What is the change of propagation speed referred to as?

Answer 9

Refraction

Question 10

What is the relationship with the angles if c1

Answer 10

Angle i < angle t

Question 11

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

Answer 11

Angle i > angle t

Question 12

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

Answer 12

The object appears to be bigger

• lateral position error
• duplication of aorta