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Waves Unit 3
Terms in this set (34)
Mechanical waves in which the particles of matter in the medium vibrate by moving back and forth and perpendicular (at right angles) to the direction the wave travels.
Waves that can only transmit energy through a medium.
Mechanical waves in which the particles of matter in the medium vibrate by pushing together and moving apart parallel to the direction in which the wave travels.
These are waves that can travel through matter or empty space where matter is not present.
A solid, liquid, or gas
The place on the wave that is moving apart.
The place on the wave that is pushed together.
The bouncing back of a wave when it meets a surface or boundary that does not absorb the entire wave's energy. Ex: Sound waves bounce off objects and cause echoes.
the bending of waves caused by a change in their speed as they pass from one medium to another. Ex: Light going from air through a convex lens (magnifying glass) can make images appear larger as the light waves bend.
occurs when waves pass through a given point or medium. Ex: Sound waves are transmitted through solids, liquids, and gases.
occurs when the energy is not transferred through, or reflected by, the given medium. Objects or substances that absorb energy become warmer and convert the absorbed energy to infrared radiation (heat). Ex: asphalt in the sun will absorb light and create heat
materials transmit some light, but cause it to be scattered so no clear image is seen. Ex: Frosted glass
A crest will interfere with another crest to produce a larger crest and a trough will interfere to produce a larger trough. In other words, the crests line up with crests and troughs line up with troughs.)
A crest will interfere with a trough to lessen or cancel the displacement of each. In other words, the crests do not line up with crests and troughs do not line up with troughs.
clear front surface of the eye that provides protection and refracts light.
a hole located in the center of the iris of the eye that allows light to strike the retina.
the thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil. Eye color is defined by the color of the iris.
the sensory membrane that lines the inner surface of the back of the eyeball.
transmits impulses to the brain from the retina at the back of the eye.
a transparent, biconvex structure in the eye that helps to refract and focus it on the retina.
tiny light sensitive nerves in the retina that transfer the energy of the light waves to nerve impulses transmitted through the optic nerve to the brain for interpretation as sight. These are responsible for our seeing colored images.
allow only certain colors of light to pass/transmit through them; they absorb or reflect all other colors. For example, a blue filter only transmits blue light. Objects seen through a blue filter will look blue if the objects reflect blue; objects of other colors will appear black because the other color wavelengths are being absorbed by the filter.
materials (may be clear or colored material such as filters) that allow most of the light that strikes them to pass through them. Only a small amount of light is reflected or absorbed. Ex: clear glass
materials that allow no light waves to be transmitted through them. Ex: Wood
Give two examples of a Mechanical Wave.
water waves, sound waves, seismic (earthquake) waves, waves created along a rope or spring.
Give two examples of an Electromagnetic Wave.
Light waves, radio waves, gamma rays, etc.
How do mechanical waves transfer energy?
Through a medium
How do electromagnetic waves transfer energy?
Through a medium and empty space
Why is sound unable to travel through a vacuum?
They require the particles of the medium to vibrate in order for energy to be transferred. Empty space has no particles for the waves to vibrate on.
In what type of medium is the speed of sound fastest (solid, liquid, or gas)?
Is the speed at which light travels faster in liquid, solid, gas, or empty space (a vacuum)?
If all colors of light are reflected by material, what color will the material appear to be?
If all colors of light are absorbed by material, what color will the material appear to be?
If a red light is shined on a green object, what color will that green object appear to be?
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