8 Wavelength describes frequency, or how fast a wave is. Frequency= number of wavelengths per secondMeasured in hertzIt also tells us where a wave will fall on the electromagnetic spectrumA view of all the wavelengths fromvery fast gamma raysTo very slow radio wavesThe measure from one crest to another.
10 Wavelength does not have to be equal to amplitude, they are separate Color and pitch are based on wavelengthFaster wavelength= faster vibration and higher pitchBlue light has a faster frequency than red lightThis is what it used for photosynthesis, more energy
11 Sound Waves travel better through dense mediums like solids. Electromagnetic waves, like light travel best in open spaceThis is why we get light from the sun so fastBut it changes direction as it hits the atmosphere
13 Reflection and refraction reflection is when a wave bounces off an object and changes directionEcho and mirrorsRefraction is when the wave slows down and changes its angle as it passes from one medium to the other.A glass with water in it
15 Doppler effect- sound waves get compressed causing a high pitch as the object gets closer to you. as the object moves past the sound waves get longer and the tone gets lower.Like a sirenBlue-red shift- as light moves away from you it get red, because red has a longer wave lengthAs light come toward you it is blue, blue has a shorter wave length
17 Use Doppler effect to Check speed for police radar Check position of satellitesGet information over stars and other planetsAre they moving away or towards us, we can tell by the wavelength we receive
18 Lenses and mirrors Concave and convex Transparent, translucent, opaque Draw and describe the differencesTransparent, translucent, opaque
19 Diffraction Bending of waves around a barrier Like a rainbow Like water waves moving around an objectThey separate and move around the objectRemember, a wave is energy and it will keep moving untie all energy is released