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Waves
| Question | Answer |
|---|---|
| Wave | a disturbance that carries energy through matter or space |
| Name all five types of waves | mechanical, electromagnetic, tranverse, longitudinal, surface |
| what is a wave pulse? | one time; a bang |
| what is a periodic wave? | continous wave; a vibration |
| Name all parts of the wave and define them | crest- highest point; trough- lowest point; ampiltude- how high or low the wave is from the middle; wavelength- the length of the repeating pattern |
| what is frequency? | the number of waves that pass a certain point per unit of time |
| what is the period of the wave? | the time it takes for just one wavelength to pass the point |
| Define wavespeed? | is still the distance divided by the time |
| what does the wavespeed depend on? | the medium it travels through |
| sound waves | mechanical and longitudinal waves |
| what happens when a sound wave occurs | the source vibrates rapidy causing pressure vibrations in the medium |
| what is the medium? | the material a sound wave occurs in |
| what wave does not require a medium? | electromagnetic waves |
| what wave does require a medium? | mechanical waves |
| what wave has the particles move in circles? | surface waves |
| what vibration is lower then twenty hz | infrasounds |
| what vibrations are higher then 20,000 Hz | ultrasound |
| what do our ears sense when a sound wave occurs? | vibrations and them amplifies them; it sends impulses to the brain |
| loudness depends on.... | intensity of the sound wave |
| Pitch | how high or low the sound can be; not how lound |
| pitch depends on what? | frequency |
| Echo | a sound bouncing off an object, can be controlled by surface material |
| what are echos important for? | S.O.N.A.R and sonograms |
| refraction | the bending of light |
| reflection | light rays bouncing off of a surface |
| line of referance is what? | the normal line |
| what is law of refection? | when light strikes an object it refelcts off at the same angle |
| what does speed depend on? | medium and temperature |
| Name all parts of the electromagnetic spectrum | radio waves, infared, ultraviolet, gamma, visible, microwaves |
| when images are in the mirror they are what | reversed |
| when images are in front of the mirror they are also | the same distance behind the mirror |
| what is the angle of incidence | the incoming light, the angle of the light rays striking a surface |
| what is the angle of relection | the angle of light reflecting off the surface; outgoing light |
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