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Wave Behaviors

Wave Behaviors. Unit 2: Waves. What can waves do once they are traveling?. Waves can bend: Refraction Usually caused by speed changes when moving from one medium to another. The greater the speed change the greater the bend. What can waves do once they are traveling?.

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Wave Behaviors

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  1. Wave Behaviors Unit 2: Waves

  2. What can waves do once they are traveling? • Waves can bend: Refraction • Usually caused by speed changes when moving from one medium to another. • The greater the speed change the greater the bend.

  3. What can waves do once they are traveling? • Diffraction:  occurs when waves bend around small obstacles, or when waves spread out after they pass through small openings • Example: Prisms

  4. What can waves do once they are traveling? • They can bounce back and turn around: reflection. • This happens when it meets a surface that does not absorb the energy of the wave. • All waves can do this. • Echoes: reflection of sound waves • Mirrors: reflection of light waves

  5. What can waves do once they are traveling? • They can simply pass through a given point or the medium: Transmission. • Sometimes not all the energy is transmitted. This is mainly seen when dealing with light waves.

  6. What can waves do once they are traveling? • They can absorbed by the medium. • This happens when the wave is not transmitted or reflected by the medium.

  7. Sometimes, waves can interfere with each other: • They can interfere constructively. This means that when two crests meet then they get added together to make a bigger crest. The same is said for when two troughs meet, when two compressions meet, and when two rarefactions meet.

  8. Sometimes, waves can interfere with each other: • They can interfere destructively. This is when a crest and a trough meet or compression and rarefaction meet, the interference will cause the two to cancel out or lesson in amplitude.

  9. Interference and Sound • Sound waves interfere with each other and can ultimately change what you hear. • Destructive interference makes sounds quieter; Constructive interference makes sounds louder. • Sound waves reflect in tubes or some musical instruments to produce standing waves which reinforce sound through constructive interference to make the sound louder.

  10. Recap

  11. Activity • You will be divided into groups of 2 or 3. There are 9 stations set up around the room. You are to go to each station and tell which behavior you are looking at and why you believe it is that behavior. • Work will be completed on a hand out and turned in when you are done.

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