472711
Description
Mind Map by Caitlin Hadfield, updated more than 1 year ago
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Created by Caitlin Hadfield
almost 11 years ago
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The Electromagnetic Spectrum
- X-Rays
- have a high frequency and low
wavelength
- Radiologists wear lead aprons to protect their
bodies from absorbing excess X-ray waves.
- X-Rays are used medically to detect
broken bones or problems within the
body.
- X-rays pass through skin and tissue but is
absorbed by bones and dense materials
- have a high frequency and low
wavelength
- Gamma, X-Ray, UV, Visible Light, Infra Red, Microwaves, Radio / TV
- Refraction happens in all
waves.
- Reflection happens in all
waves.
- all waves transmit and absorb energy.
- all waves travel through a vacuum at the same
speed (300,000,000 m/s) but have different
wavelengths and frequencies.
- Refraction happens in all
waves.
- Gamma
- has the shortest wavelength and highest
frequency
- Lots of energy is transferred meaning
Gamma is the most harmful wave.
- Used to kill Cancer cells
- Used to sterilize medical
equiptment and objects
- has the shortest wavelength and highest
frequency
- Infra Red
- The hotter an object is, the more Infra
Red radiation it emits.
- Uses
- Electric Oven
- Thermal Imaging
- Heat
- Cooking
- Remote Controls
- Security Lights
- Burglar Alarm
- Electric Oven
- infra red is absorbed by skin: too much can burn your skin
- The hotter an object is, the more Infra
Red radiation it emits.
- Micro Waves
- lower frequencies and longer wavelengths
- absorbed by water molecules and used for
cooking.
- water in food absorbs microwaves and gives the molecules kinetic energy which makes
them continuously flip to produces heat that cooks the food. cooks from the inside to the
outside
- can be used to transmit mobile phone
signals
- some microwaves can pass through the earth's atmosphere and transmit signals to satellites
- living organisms can absorb microwaves in their
body tissue which may affect internal organs
- lower frequencies and longer wavelengths
- Radio
- used to transmit radio and TV
programs aswell as moble signals
- living organisms can absorb radio waves in
their body tisuse which may affect internal
organs
- used to transmit radio and TV
programs aswell as moble signals
- optical fibres
- used to transmit signals carried
by visible light or infra red.
- signals travel down the
fibre by repeated total
internal reflection.
- used to transmit signals carried
by visible light or infra red.
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