2. Key Objectives:Key Objectives:
Investigate and understand the nature and
describe the characteristics of two types
of waves.
– Transverse Waves
– Longitudinal Waves
http://www.youtube.com/watch?
v=27a26e2CnuM
Model, label and draw diagrams of each.
4. Wave
A disturbance that
carries energy away
from its source
through matter or
empty space.
Three categories:
– Mechanical Waves
– Electromagnetic
Waves
– Matter Waves
5. Transverse Wave
A type of wave that
can travel through
both a medium or
empty space.
The energy moves
perpendicular to the
direction of the
wave.
– Light
– Water
6. Longitudinal Wave
A type of wave that
must travel through
a medium.
The energy moves
parallel to the
direction of the wave
– Sound
9. Frequency
The number of
waves counted in a
specific period of
time. (per second)
– Measured in Hertz
(Hz)
10. Amplitude
In a transverse wave:
The height or depth or
difference from the
rest point to the peak
of a wave
In a longitudinal wave:
The density/thickness
of the compression
17. Essential Learnings
All waves exhibit certain
characteristics
– Wavelength refers to the length of a wave
or distance between two identical points
on a wave (Length)
– Frequency refers to the amount of waves
in a period of time (Speed)
– Amplitude refers to the size of the energy
wave (Strength)
18. Essential Learnings
Wavelength is inversely
proportional to frequency.
– Wavelength increases Frequency
decreases
– Frequency increases Wavelength
decreases
19. Essential Learnings
Transverse Waves
– Energy travels perpendicular to the
wave
– Do not require a medium
– Amplitude is the distance from the
rest position to the crest or trough of
the wave.
– Light travels in Transverse Waves
20. Essential Learnings
Longitudinal Waves
– Energy travels parallel to the wave
– The portion of this wave where it is
crowded together is called the
compression
– The portion where the space
between compressions is greatest is
called the rarefaction.
21. Essential Learnings
Longitudinal Waves
– Requires a medium
– Wavelength is the distance from one
compression to the next compression
of the wave.
– Sound being produced by vibrations
travels in Longitudinal Waves