Question

directions: sort the following as a characteristic of wavelength, frequency or amplitude.
associated with the energy of an electromagnetic wave
wavelength frequency amplitude

Explanation:

For electromagnetic waves, the energy \( E \) is related to frequency \( f \) by the formula \( E = hf \) (where \( h \) is Planck's constant). Wavelength (\( \lambda \)) and frequency are related by \( c=\lambda f \) ( \( c \) is speed of light), but energy is directly proportional to frequency. Amplitude relates to intensity (not energy of a single photon - type energy here). So the characteristic "associated with the energy of an electromagnetic wave" corresponds to frequency.

Answer:

Frequency