Study Science: Chap. 12 Review Flash Cards

 
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Science: Chap. 12 Review

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list the regions of the electromagnetic spectrum from the shortest wavelengths to the longest wavelengths
gamma rays
x-rays
ultraviolet
visible light
infrared
microwaves
T.V, F.M
Radio Waves
state one piece of evidence supporting the particle model of light
light can knock electrons off metals and travel through a vacuum
state one piece of evidence supporting the wave model of light
light experiences reflection, refraction, diffraction, interference
when an object is leaving, what happens to the frequency, wavelength, speed, and pitch?
increases: wavelength
decreases: frequency, pitch
same: speed
when an object is approaching, what happens to the frequency, wavelength, speed, and pitch?
increases: frequency, pitch
decreases: wavelength
same: speed
why do objects have color?
because they reflect certain wavelengths of light
why is light sometimes black?
because there is an absence of color
why is light sometimes white?
because all colors are combined together
curved mirrors distort images because...
the angles at which light is reflected are not all the same
flat mirrors form...
virtual images
what is the Law of Reflection?
the angle of incidence equals the angle of reflection
smooth surfaces reflect rays in ______ direction
the same
rough surfaces reflect rays in _______ directions
all
rainbows are caused by...
disperion and internal reflection as water droplets in the air cause light to bend at different angle
in a spectrum, violet light is bent more than red because violet light...
traves slower than red light
a _____ seperates white light into seperate colors (dispersion)
prism
______ can magnify images, creating virtual images of different size
lenses
_____ makes objects appear in different positions
refraction
light is bent when it passes through different mediums because...
the speed is different through different mediums
when the wavelength is 5.89x10^-7 and the speed is 1.94x10^8 m/s, what is the frequency?
3.3x10^14 Hz
when the frequency is 2.5x10^4 Hz, and the speed is 331 m/s, what is the wavelength?
0.01 m
a wave crest passes you 5 times every 15 seconds. what is the frequency? period?
frequency: 1/3 m/s
period: 3 seconds
pules down a stretch of rope: 2 pulses per second. The distance between pulses is 5 meters. What is the speed?
10 m/s
a man is standing on the shore. every 5 seconds a wave comes. what is the period?
5 seconds
the amount of light illuminating a surface
intensity
brightness depends on...
intensity and distance
energy is proportional to...
frequency
resonance is heard when the body of an instrument vibrates...
at the same frequency as the strings
sound is produced by...
standing waves
pitch is determined by...
frequency
a. rapid vibrations = high frequency = high pitch
intensity is proportional to...
amplitude
loudness is determined by...
intensity
what transwers sound waves faster out of solid, liquid, and gas?
solids and liquids
the speed of sound depends on...
how often molecules of the medium collide and transmit energy.
a. more collisions = faster speed
waves are defined as transfers of...
energy
the frequency of a sound wave determines...
pitch
sound waves are __________ waves
longitudinal
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