The energy of an electromagnetic wave is related to select all that apply.
1) the wave's amplitude
2) the wave's frequency
3) the wavelength
4) the wave's pressure

1) the wave's amplitude  

2) the wave's frequency

3) the wavelength

Explanation:

The energy of EM wave is given by:

E = h ν = h c/λ

Thus, energy of the EM wave directly proportional to the frequency of the wave and inversely proportional to its wavelength.

The energy of EM wave is also related to its amplitude. It is directly proportional to the square of the amplitude:

E ∝ A²

force tends to be low and long diustance masses are high