ELECTROMAGNETIC RADIATION speed of light c = 3x108 m.s-1
 particle-like
wave-like 
Wave Model
wavelength  [m] frequency f [hertz Hz]
c f 
f 
c


c
f
Interference and diffraction (constructive destructive)
Particle Model
stream of particles photons
E photon  h f 
Equation Mindmap eq19:
hc

Doing Physics on Line
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