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GCSE Physics
Paper 2
Waves
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Cards (27)
What is amplitude in wave properties?
Maximum displacement from
undisturbed position
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What is wavelength in wave properties?
Distance
from one wave point to the next
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What is frequency in wave properties?
Number of
complete
waves passing a point
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What is period in wave properties?
Time
taken for
one
complete
wave
to
pass
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What is the frequency of a wave with a period of 0.01s?
100
Hz
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How do you calculate wave velocity?
Wave velocity =
frequency
x
wavelength
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What is the wavelength of a wave with a frequency of 20 Hz travelling at 120 m/s?
6
m
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What happens at a boundary when a wave travels from one medium to another?
Its
velocity
and direction can change
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What can happen to waves at a boundary?
They can
reflect
,
transmit
, or be
absorbed
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What is ultrasound?
Sound with a frequency above
20,000
Hz
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What is ultrasound useful for?
Scans
and
sonar
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How do you measure the velocity of ripples?
Using a ripple tank to measure
wavelength
and
frequency
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How do you measure the velocity of sound?
By timing an echo or using an
oscilloscope
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How are electromagnetic waves used in medicine?
Gamma rays
for treatment,
X-rays
for imaging
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What are the dangers of high doses of UV, X-ray, and gamma radiation?
They can cause
cancer
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How do thermograms work in medical imaging?
They show different
temperatures
from injuries
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How do X-rays work in medical imaging?
They show
broken
bones
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How do CT scans produce images?
They use
X-rays
to create
3D
images
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How are gamma rays used in medical imaging?
As
tracers
to find organ functions
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How do sound waves travel through solids?
As
vibrations
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What happens in the ear when sound waves enter?
They cause the
eardrum
and
bones
to vibrate
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What are the two types of lenses?
Convex
and
concave
lenses
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What do convex lenses do?
Bring
parallel rays of light
to a focus
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What do concave lenses do?
Spread rays of light
apart
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What happens when white light is split by a prism?
Each color is
refracted
differently
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Why do colored surfaces appear a certain color?
They reflect some
wavelengths
and absorb others
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What do color filters do?
Absorb
some colors and
transmit
others
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