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Light & Sound Test Review
Transcript of Light & Sound Test Review
1. Natural Light
2. Artificial Light Reflection & Refraction Light can be reflected (bouncing off of objects)
Transparent objects: allow most of the light to pass through
Translucent objects: allow some of the light to pass through
Opaque objects: allow none of the light to pass through
- Vocabulary, vocabulary, vocabulary!
- How we use light and sound in everyday life
Your study package will be a very helpful tool. Light travel in a straight path:
The best reflectors are flat,
shiny surfaces. A mirror is a
good example. Light can be refracted (bent) Refraction is the bending of light as it passes from one substance to another White light SOUND - A form of energy that can be heard
- Travels in waves, travels in all directions. Also travels through gases, liquids and solids
- Caused by vibrations (a back and forth motion) Sound can be modified (changed) - The loudness of a sound depends on the size of the vibrations of a sound wave; the smaller the vibrations, the lower the volume
- Volume = the loudness of a sound
- Frequency is the number of waves per second and the pitch of a sound depends on the frequency of the vibrations that are making it.
- The more vibrations, the higher the pitch
- The fewer vibrations, the lower the pitch
Animals that hear sounds at different pitches from humans: Low pitch: High pitch: The Ear Reflecting and Absorbing Sound Reflecting sound: hard, smooth surfaces are the most effective reflectors of sound. Echoes are a result of this reflection.
Absorbing sound: soft surfaces are the most effective absorbing surfaces of sound