Transcript Wave Interactions

Wave Interactions
Pre-Assessment
1. Define Reflection
•The bouncing back of
a wave when it meets
a surface boundary
2. Draw a wave being reflected on
a fixed boundary.
• Direction of movement
3 and 4 Bending of waves as they
pass an edge is called diffraction.
Draw waves being diffracted
around a single obstacle.
Obstacle
5.
•Refraction is the bending of
waves when they pass from
one medium to another at
an angle.
6.
•What type of wave
interaction is shown when
two or more waves
combine?
•Answer: Interference
7. Draw an example of
constructive interference
Resulting Wave
Original Waves
8. Draw an example of
destructive interference.
Original Waves
Resulting
9.
• Two different sounds have two different
frequencies.
10. Explain how you hear beats.
Describe in terms of
constructive and destructive
interferences.
• Alternating loud and soft sounds
cause us to hear beats. The loud
sound is heard because of
constructive interference. The
softer sounds are due to
destructive interference.
11.
• Standing waves can form when a
wave is reflected at the boundary
of a medium. In a standing wave,
interference of the original wave
with the reflected wave causes
the medium to vibrate in a
stationary pattern that resembles
a loop.
12. Draw a standing wave with
5 nodes and 4 antinodes. Label
them.
NODES
Antinodes
#16-18
• 16. Waves that cause the medium to
vibrate parallel to the direction of the
wave motion are called longitudinal waves.
• 17. Examples: spring moved horizontally
• 18.
Particle motion
Wave motion
19.
• Water waves are examples of surface
waves.
20.
• This type of wave occurs on the boundary
between two different mediums.
21.
• The particles in surface waves move both
perpendicularly and parallel.
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