science chapter 6
Terms
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- light produced by living organisms
- bioluminescence
- a straight line beam of light as it travels outward from its source.
- light ray
- the angle of an incoming light ray equals the angle of the reflected ray
- law of reflection
- a mirror that curves in on the shiny side
- concave mirror
- a mirror that curves out on the shiny side
- convex mirror
- completely blocking light from passing through
- opague
- letting all light through so that objects on the side can be seen clearly
- transparent
- letting only some light through so that objects on the other side appear blurry
- translucent
- allowing light vibrations to pass through in only one direction
- polarization
- a lens that curves outward and brings light rays together
- convex lens
- a lens that curves inward and spreads light rays apart
- concave lens
- a cut piece of glass with 2 opposite sides in the shape of a triangle or other geometric shape
- prism
- a band of colors produced when light goes through a prism
- spectrum
- red, green, or blue; mixing these colors can produce all the colors of the spectrum
- primary color
- magenta, cyan, yellow; material with any of these colors absords one primary color of light and reflects the other two
- primary pigment
- the production of magnetism by electricity and the production of electricity by magnets
- electromagnetism
- all the wavelengths of visible and invisible in order from short to long
- electromagnetic spectrum
- a device that produces a thin stream of light of just a few close wavelengths
- laser
- one of a series of pitches that blend to give a sound its quality
- overtone
- the change in frequency and pitch as a source of sound moves toward or away from you
- doppler effect
- the finding of an object by using reflected sound
- echolocation
- a reflected sound wave
- echo
- the disappearance of a sound wave into a surface
- absorption
- the bouncing of a sound wave off a surface
- reflection
- the part of a sound wave where molecules are spread apart
- rarefaction
- how high or low a sound is
- pitch
- the number of times an object vibrates per second
- frequency
- a unit for measuring loundness
- decibel
- a back and forth movement
- vibration
- anything that has mass and takes up space
- matter
- a vibration that spreads away from a vibrating object
- sound wave
- the part of a sound wave where molecules are crowded together
- compression
- the difference you hear between two sounds of the same loudness and pitch
- quality
- the bending of light rays as they pass from one substance into another
- refraction