Quantities, Units and Formulae
Quantity
Abbreviation
Unit
Unit Abbreviation
time
t, T
second
s
distance
d
metre
m
speed
s, v
metre per second
ms
-1
frequency
f
hertz
Hz
wavelength
l
(lambda)
metre
m
period
T
second
s
d = s t
v = f
l
f = 1 / T
v = a t, which can be rewritten as:
a = v / t
t = v / a
f = v /
l
Both give f, hence,
1 / T = v /
l