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Physics
waves
EM waves
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Lucy
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Cards (9)
transverse
waves that transfer
energy
from the source of the wave to an absorber
increases
frequency as wavelength
decreases
Radiowaves uses
television
and
radio
communications
microwaves
uses
used in satellite communications as their
short
wave length can penetrate
atmosphere
and reach satellites
in microwaves as they can penetrate food to cause
heating
infared uses
absorption
causes
heating
so used in electrical heaters such as toasters
infared cameras
Visible light uses
fibre optic communications
- signals can travel down fibre
UV
energy efficient
light bulbs
tanning
beds
XRAYS
Can penetrate soft
tissues
but not
bone
- useful for medical imagery
gamma uses
steralise
medical equipment
radiotherapy
- destroys tumor cells