The Electromagnetic Spectrum (Edexcel GCSE Physics Combined Science): Flashcards
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Wave type: electromagnetic waves
Wave type: electromagnetic waves
Transverse
What EM waves transfer
What EM waves transfer
Energy from source to absorber
Speed of EM waves in vacuum
Speed of EM waves in vacuum
m/s
Part of EM spectrum humans see
Part of EM spectrum humans see
Visible light only
Visible color: longest wavelength
Visible color: longest wavelength
Red
Visible color: shortest wavelength
Visible color: shortest wavelength
Violet
Do EM waves need a medium?
Do EM waves need a medium?
No, travel through vacuum
Radio waves: main use
Radio waves: main use
Radio & TV signal transmission
Microwaves: food use
Microwaves: food use
Heating food (water absorbs energy)
Microwaves: space use
Microwaves: space use
Satellite communication
Infrared: building use
Infrared: building use
Cameras check heat losses
Visible light: communication use
Visible light: communication use
Fibre optics
X-rays: main use
X-rays: main use
Medical imaging, visualize bones
Gamma rays: main use
Gamma rays: main use
Detect & treat cancer
As wavelength decreases, frequency...
As wavelength decreases, frequency...
Increases