click below
click below
Normal Size Small Size show me how
Ch 16-17
2 Semester Science Exam
Question | Answer |
---|---|
What three things does the speed of sound depend on? | Density, elasticity, temperature |
Loudness correlates with which part of the wave? | Amplitude |
Pitch correlates with which part of the wave? | Frequency |
What causes the Doppler Effect? | Source is moving, so frequency of the wave changes. The motion of the source and the motion of the wave combine. |
Give an example of the Doppler Effect. | A fire truck goes by and the siren sounds different as the truck is going away from you. |
What is echolocation? | The use of a reflected sound wave to determine distance or location of an object. |
What is an electromagnetic wave? | Vibrating electric or magnetic fields. |
Can an electric and magnetic field be separated? | No. |
What kind of angle separates the electric and megnetic field? | Right angle |
Do electromagnetic waves require a medium? | No. |
Do mechanical waves require a medium? | Yes. |
Which electromagnetic waves travel fastest? | Radio waves. |
List the seven categories of electromagnetic waves. | Radio waves, microwaves, infrared waves, visible light waves, unltraviolet rays, x-rays, gammma rays |
What are the two models for electromagnetic waves? | Wave model, and particle model |
What is polarized light? | Light waves that pass through a polarized filter. |