2035530
Description
Mind Map by James Disley, updated more than 1 year ago
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Created by James Disley
almost 10 years ago
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|
P1A Topic 2
- Electromagnetic waves Increases Frequency from left to right meaning the wavelength decreases.
- Radio waves
- Broadcast tv
and radio.
- Broadcast tv
and radio.
- Microwaves
- Satellite
communication
- Cook food (different
wavelength)
- Satellite
communication
- Infrared
- Use to monitor
temperature
(night-vision
equipment)
- Optical fibres
transmit data.
- Used in
toaster, remote
controls and
security system
- Use to monitor
temperature
(night-vision
equipment)
- Visible light
- Too see
- Too see
- Ultra violet
- Used to detect forged
banknotes (displays
fluorescent markings)
- Used to detect forged
banknotes (displays
fluorescent markings)
- X-rays
- Look inside
objects
- X-rays pass through flesh.
- X-rays absorbed
by bone.
- X-rays pass through flesh.
- Look inside
objects
- Gamma waves
- Treat cancer
- Sterilisation of food
and surgical
instruments.
- Treat cancer
- The higher the frequency the more
damage it can do. Ex micro = heat body
cells, Infra= Skin burns, ultra=skin
cancer, Gamma= cell mutation.
- Radio waves
- Herschel
- Discovered infared (1800)
- Diffracted white light
into the colour
spectrum using a prism.
- Measured each colour
using a thermometer.
- Temperature increased
from violet to red
- Beyond red he
found the highest
temperature.
- Discovered infared (1800)
- Ritter
- Discovered ultraviolet
(1801)
- Diffracted white light
into the colour
spectrum using a prism.
- Measured each
colour with silver
chloride coated
strips.
- Silver
chloride
when
exposed to
light turns
black from
white.
- Time how long it
takes to change.
- Time how long it
takes to change.
- Silver
chloride
when
exposed to
light turns
black from
white.
- The blue end
changed quicker
then the red end.
- Placed one beyond violet
quickest change
occurred.
- Discovered ultraviolet
(1801)
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