a base
a pH scale
all of the above
The word that best fits is frequency. Thus,the sentence is,the frequency of a wave is a measure of the amount of energy it carries.
The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
There is a direct relationship between frequency and energy of a wave. The constant of proportionality is h, Planck's constant. So, Energy = h frequency. So, the answer is frequency.
Learn more about electromagnetic radiation,here:
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