1. Making Waves

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.

3. Key TermsKey Terms
 Wave
 Wavelength
 Frequency
 Transverse Wave
 Amplitude
 Crest
 Trough
 Longitudinal Wave
 Compression
 Rarefaction

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

7. All Waves

8. Wavelength
The length of the
wave.
Measured from two
identical points on a
wave

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

11. The Transverse Wave
 http://www.youtube.com/watch?v=UHcse1jJAto

12. Crest
The top point of a
transverse wave

13. Trough
The lowest
point of a
transverse
wave

14. The Longitudinal Wave
http://www.youtube.com/watch?v=ubRlaCCQfDk&feature=related

15. Compression
The
densest/thick
part of a
longitudinal
wave

16. Rarefaction
The spaced out
section of a
longitudinal
wave between
each
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

22. Essential Learnings
Fin