Electromagnetic Waves/Spectrum Flashcards
Name the electromagnetic spectrum in order
(starting with longest wavelength, lowest frequency and lowest energy)
- Radio
- Microwaves
- Infra-red
- Light
- UV
- X-Rays
- Gamma
what is white light?
the 7 colours of the spectrum
- red
- orange
- yellow
- green
- blue
- violet
- indigo
what do Electromagnetic waves transfer?
Energy
what are the uses and dangers of radio waves?
Uses Dangers
- radio - None
- Tv signals
what are the uses & dangers of microwaves?
Uses Dangers
- phones-communication -high frequency can cause burns
- heating food
Uses and dangers of Infra-red radiation
Uses Dangers
- heaters - can cause burns
- cameras
Uses & dangers of visible light
Uses Dangers
- to see - can cause blindness
- Photography
Uses & disadvantages of UV
Uses Dangers
- tanning-UV beds - skin cancer
- can cause blindness
Uses & disadvantages of X-Rays
Uses Dangers
-observe bodies -can cause cancer with high exposure
Uses & disadvantages of Gamma
Uses Dangers
- kill cancer cells - cancer growth
- kill harmful bacteria in food - exposure-destroy cells
what are optical fibres?
Long thin tubes
How are radio waves produced?
Long wavelengths that can be transmitted
