Units of meters for wavelength are chosen so that the constant c (speed of light) with units of meters can be used.
(Units of meters for wavelength; are chosen; so that the constant c (speed of light) with units of meters can be used) (the constant c (speed of light) with units of meters; can be used; )
Units of meters for wavelength the constant c (speed of light) with units of meters
are chosen can be used
so that the constant c (speed of light) with units of meters can be used