Question

the difference in energy between different forms of electromagnetic radiation is the result of changes in which two of the following? (select two)
wavelength
frequency
velocity
amplitude

Explanation:

The energy of electromagnetic radiation is given by $E = h
u=\frac{hc}{\lambda}$, where $h$ is Planck's constant, $
u$ is frequency, $c$ is the speed of light in vacuum, and $\lambda$ is wavelength. Energy depends on frequency and wavelength. The speed of electromagnetic - radiation in a vacuum is constant ($c$), and amplitude is related to the intensity of the radiation, not its energy per photon.

Answer:

Wavelength, Frequency