Physics Unit 4 -Sound and Waves B.

Question 1

Fixed End Reflection

Wave pulses

Answer 1

Wave pulses relfecting from a fixed end reflect INVERTED with the SAME amplitude

Question 2

Free End Reflection

Answer 2

Wave pulses reflecting from a free end reflect UNCHANGED with SAME amplitude

Question 3

2 Rules when moving wave pulse from one substance to another

Answer 3

1. Some energy from original wave pulse is TRANSMITTED
2. Some energy from original wave pulse is REFLECTED

Question 4

What does the amount and type of reflection depend on (When going from one substance to another?)

Answer 4

Difference in density

Question 5

When a wave pulse is going from a Faster to a Slower medium (Low -> High) how do the reflected and transmitted pulses change?

Answer 5

Reflected: Inverted w/ smaller amplitude
Transmitted: unaffected, reduced amplitude

Question 6

When a wave pulse is moving from a fast to slow medium, why the amplitude reduced?

Answer 6

b/c in a dense medium, it is difficult for particles to move to more dense mediums