Sound & Light (Science Final Exam)

waves bend and spread out

the measure of a sound's loudness

destructive interference at zero amplitude

300,000,000 meters per second

part of the ear that converts sound waves to nerve signals

measures the time it takes to reflect sound waves

indicates that light sometimes acts like a wave

does not use radio waves

part of the eye that responds to color

a disturbance that transfers energy from place to place

• red
• green
• blue

as a sound source moves toward a listener, pitch appears to increase

picture of heat taken by an infrared camera

uses lenses to view things that are very far away

• moves particals of the medium parallel to the direction of the wave
• ex. spring, like on the trampoline (they are LONG)

powerful surface wave caused by an earthquake

• picture that shows reflected sound waves from tissue
• ex. the picture you get of the baby inside a mama

an EM wvae that doesn't need a medium through which to travel

• light partially reflects and refracts
• you can somewhat see through it; may look foggy
• ex. shower door

• one color
• one frequency

all colors and all frequencies of the visible sprectrum

combinations of tones that are pleasing to hear

combinations of tones that are NOT pleasing to hear

colors and wavelengths

relation to elasticity (more elastic=higher speed) and temperature (higher temp=higher speed)

• right-side up
• rays do not meet

• upside-down
• rays meet at a point