Frequency:

${\displaystyle {\begin{matrix}f={\frac {1}{T}}.\end{matrix}}}$

(2.6)

Speed:

${\displaystyle {\begin{matrix}v&=&f\lambda \\&=&{\frac {\lambda }{T}}\end{matrix}}}$

Table 2.1: Units used in Waves

Quantity	Symbol	S.I. Units			Direction
Amplitude	A	m			--
Period	T	s			--
Wavelength	${\displaystyle \lambda }$	m			--
Frequency	f	Hz or s−1			--
Speed	v	m.s−1			--