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I when are concave lenses used? 47 transverse wave
L mirror curved inward 6 cornea
MM change in the direction of a wave when the wave finds an obstacle or and edge, such as an opening 44 wave length
UU wave in which the particles of the medium move perpendicularly to the direction of the wave is traveling 33 loudness
BB make sound when the string that vibrate are plucked 26 percussion
VV physical environment in which a phenomenon occurs 1 laser
DD reflected sound waves 2 retina
A device that produces intence light of only one color 39 diffraction
Q object not transparent/translucent 12 concave mirror
Z make sound when struck 34 pitch
S bouncing back of waves 3 lens
JJ when two waves with the same amplitude combine, they cancel out 42 wave speed
CC use of reflected sounds to find an object 13 plane mirror
TT particles of the medium vibrate back and forth along the path that the wave moves 36 destructive interference
G when the eye is too short, causes the lens to focus light behind the retina 29 echolocation
SS related to the height of a wave- maximum distance the particles of a medium vibrate from their rest position 25 string, wind, percussion
PP speed at which a wave travels through a medium 28 string
H when the eye is too long and causes the light to focus in front of the retina 5 pupil
V 7 parts of em spectrum in order 35 resonance
KK when waves combine and have a longer amplitude 22 radio waves, microwaves, infrared rays, visible light, ultraviolet rays, xrays, gamma rays
LL combination fo two/more waves that results in a single wave 15 translucent
GG how loud/to what extent a sound can be heard 4 iris
E opening in the eye through which light passes 8 nearsightedness
Y name the 3 different kinds of instruments 38 interference
B back surface of the eye, where light is detected by rods and cones 45 amplitude
F membrane that protects the eye through which light is reflected 14 blue, red, green
O matter that transmits light but not an image (see through but kind of blurry)  48 medium
R bending of a wave as it passes at an angle from one substance/material to another 9 microscopes, glasses
J wen are convex lenses used? 24 electromagnetic waves
P allows light to pass through easily (see through clearly) 16 transparent
T transfer of energy carried by light waves to particles of matter 11 concave mirror
W transfer of energy as em waves 37 constructive interference
X wave that consists of electric and magnetic fields that vibrate at right angles to each other 17 opaque
D colored part of the eye that controls the size of the pupil 43 frequency
AA produces sound when vibration is created at one end of its air column 21 scattering
QQ number of waves produced in a given amount of time 20 absorption
C convex and refracts light to focus a real image on the back of the eye 30 echo
OO bouncing back of a ray of light sound or heat when the ray hits a surface that does not go through 23 radiation
EE observed change in the frequency of a wave when the source/ observer is moving 27 wind
HH how low/high a sound seems to be 7 farsightedness
K mirror curved outward 10 magnifying glass, camera lens
FF most common unit used to express loudness 18 refraction
M mirror that has a flat surface 19 reflection
WW periodic disturbance in a solid, liquid, or gas as energy is transmitted through a medium 49 wave
NN bending of a wave as the wave passes between two substances in which the speed of the wave differs 32 decibels
RR distance from any point on a wave to an identical point on the next wave 46 longitudinal wave
U interaction of light with matter that causes light to change direction 41 reflection
N what are the three primary colors of light 31 doppler effect
II when and object vibrating at/near the resonant frequency of a second object, the second object starts vibrating 40 refraction

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