1. Waves

2. What is a wave?
A disturbance that travels through a medium from one location to another location
A medium is a substance or material which carries the wave

3. Longitudinal
Vibrates parallel to (in the same direction of) wave travel
sound waves
the other end of the medium without the actual movement of matter
Animation courtesy of Dr. Dan Russell, Kettering University

4. Animation courtesy of Dr. Dan Russell, Kettering University

5. Longitudinal Use your Slinky to demonstrate a longitudinal wave:
Work with a partner
Stretch it out along the table
One of you grasp and draw several coils of a stretched Slinky toward yourself
Release the coils
The other student must hold his or her end of the Slinky still
A longitudinal wave pulse will be generated and travel down the length of the Slinky.

6. Longitudinal Are composed of
Compressions, where the parts of the medium (coils of the Slinky) are closer together than normal
In this investigation, you created (generated) compressional longitudinal waves
The waves traveled through a media (the slinky)

7. Longitudinal Use your Slinky to demonstrate a longitudinal wave:
Work with a partner
Stretch it out along the table
One of you stretch a segment of the Slinky
Release the coils
The other student must hold his or her end of the Slinky still
A longitudinal wave pulse will be generated and travel down the length of the Slinky.

8. Longitudinal Are composed of
Rarefactions, where the parts of the medium are farther apart than normal
In this demonstration, you created (generated) rarefactional longitudinal waves
The waves traveled through a media (the slinky)

9. Transverse Vibrates perpendicular (at right angles) to the wave travel
Electromagnetic waves
Animation courtesy of Dr. Dan Russell, Kettering University

10. Transverse Use your Slinky to demonstrate a transverse wave:
Work with a partner
One of you move your end of the Slinky back and forth (left and right, like a snake crawling), perpendicular to its stretched length.
The other student must hold his or her end of the Slinky still
A series of transverse waves will be generated and will travel through a medium (Slinky)

11. Water Waves A combination of longitudinal & transverse
Animation courtesy of Dr. Dan Russell, Kettering University

12. Electromagnetic Waves
Wave which is capable of transmitting its energy through a vacuum (i.e., empty space)
Produced by the vibration of electrons within atoms on the Sun's surface
Travel through space until they reach Earth These waves subsequently travel through the vacuum of outer space, subsequently reaching Earth

13. Mechanical Waves
Are not capable of transmitting its energy through a vacuum (space)
Require a medium in order to transport their energy from one location to another

14. Mechanical Waves
Waves traveling through a solid medium can be either transverse waves or longitudinal waves
Waves traveling through a fluid (such as a liquid or a gas) are always longitudinal waves

15. Needed Notes Wave Two Forms Two Categories Electromagnetic Waves
A disturbance that travels through a medium from one location to another location
A medium is a substance or material which carries the wave
Two Forms
Longitudinal
Vibrates parallel to (in the same direction of) wave travel
Transverse
Vibrates perpendicular (at right angles) to the wave travel
Two Categories
Electromagnetic Waves
Wave which is capable of transmitting its energy through a vacuum (i.e., empty space)
Mechanical Waves
Are not capable of transmitting its energy through a vacuum (space); require a medium in order to transport their energy