the photons of different light waves:
contain the same amount of energy.
operate at the same frequency.
contain different amounts of energy.
are created through the separation of protons from the nucleus of an atom.

contain different amounts of energy

Explanation:

The energy of a photon is given by:

Where:

is the Planck constant

is the frequency of the light which is inversely related to the wavelength.

Now, if we have photons of different light waves, this means we have photons with different frequencies.

As the energy of the photon depends on its frequency:

Photons of different light waves contain different amounts of energy.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.