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Waves
| Question | Answer |
|---|---|
| How does the pitch of sound vary with frequency? | High pitched sounds have high frequencies |
| What happens when a wave goes through a small opening? | The wave bends to get through the opening |
| What happens when a wave moves from one medium to another? | They bend and/or change speed |
| Define transverse wave: | The matter in the medium moves up and down or back and forth at right angles to the direction the wave travels |
| Does sound move faster in water or air? | Faster in water |
| Define rarefaction: | Region of spread out particles in a compressional wave |
| Define interference: | When 2 or more waves combine with each other |
| Define frequency: | Number of waves passing a given point per second |
| Define compressional wave: | Wave where matter moves back and forth in the same direction as the wave |
| Define reflection: | Action of a wave bouncing off a surface |
| Define amplitude: | Distance equal to ½ crest to trough. Is the amount of energy in a wave |
| Define wavelength: | Distance between a point on one wave and the identical point on the next wave |
| Mechanical waves need a_____ to travel through. | Medium |
| Define diffraction: | Action of a wave bending around a barrier |
| Which waves do NOT need a medium in which to travel? | Electromagnetic |
| How does the eye see an object? | Light reflects off the object and into your eyes |
| Why are some objects black? | They absorb all visible light |
| What is the bending of light when it hits a new medium called? | Refraction |
| How does a concave mirror work? | Causes light rays to diverge |
| How does the image of a convex mirror look? | It is upright (normal) |
| What does 1 hertz stand for in a wave? | 1 wave passes per second |
| What is the purpose of the outer ear? | It collects sound |
| How do you control the amount bending that occurs with lenses? | Adding more curve, or taking away curve from the sides of the lens |
| Define translucent: | A material that allows only some light to pass through |
| Define transparent: | Material that allows nearly all of the light to pass through |
| What is the relationship of wavelength to frequency in the electromagnetic spectrum? | As wavelength decreases, frequency increases (vice versa) |
| Define Radio waves & what they are useful for: | Used for cell phones |
| What kind of field do moving electrons produce? | Magnetic field |
| What are gamma rays used for? | Treat cancer and cleanse food of bacteria |
| What determines the different colors of visible light? | Each has a different wavelength |
| What is pitch? | The highness or lowness of a sound |
| What is loudness? | Human perception of the energy a wave carries |
| Define mechanical wave & give 2 examples: | A transverse or compressional wave that con only travel through matter EX: sound waves, water waves |
Created by:
jessica.porter
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