the wavelength 
is the shortest length such that 
for all 
and the period 
is the shortest time such that 
for all 
[P5.6]
is: a repetitive wave characterized by a wavelength and a period. In the case of a periodic wave described by the function the wavelength is the shortest length such that for all and the period is the shortest time such that for all [P5.6]
causes: an oscillation at any particular constant value of 
[P5.4]
is exemplified: by a sinusoidal wave 
where 
and 
[P5.4]
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