The document discusses concepts related to sound waves, including reflection, the medium required for sound transmission, and the Doppler effect. It explains how sound behaves when it strikes an object, the requirements for sound propagation, and how the pitch of sound changes based on the movement towards or away from the source. Key terms covered include reflection, medium, and the effect of motion on sound pitch.

1. The sound strikes the cantina walls and bounces off at the same angle as it struck in a process
known as _____.
A. reflection
B. refraction
C. constructive interference
D. destructive interference
14. Sound Waves
Choose One • 5 points
Obi Wan hears the destruction of a planet and all of its people through 'the force'. These sounds
are only in his head and are not carried through space, since space has no _____ through which
sound could transmit.
electromagnetic wave
electrons
magnetic field
medium
15. The Doppler Effect
Choose One • 5 points
However, had it been a real sound, the sound's pitch would have been increased by the Doppler
Effect, since the Falcon was moving _____ the source of the sound.
perpendicular to
away from
towards
at the same speed as
bounced wave 2 Angle of Reflection Angle of Incidence Incident wave A single direction of the
Sound Wave from Greedo's Blaster

2. Solution
1) Reflection .
Reflection is the change in direction of a wavefront at an interface between two different media
so that the wave front returns into the medium from which it originated.
2) Medium
Sound waves require matter to transmit them, unlike light waves.
3) Towards
The Doppler Effect tells us that as an object moves toward the source of sound, the pitch the
object feels will increase; when the object moves away, the pitch decreases. In order for the pitch
to increase, the falcon must be moving towards the source of sound.