text: if photons are particles of light, then why is their energy described in terms of frequency? if you are to model light in terms of waves, then, sure it will have its wavelength and frequency, but if u were to model it in terms of particles, then as we know, massless particles do not have wavelengths/frequencies (no de broglie wavelength because there is no mass involved). so how come when finding the enerygy of a particular photon, the equation that we use involves frequency of light? photons are evil.  remember how scientists were able to slow down light to 17m/s? if photons were massless, they wouldn't slow down becasue they wouldn't need energy to move in the first place can any amount of energy would propel them at the speed of light.  so does it mean that photons have very little mass? if so, wouldn't they increase in mass when travelling at the speed of light when energy is converted into mass?   therefore, photons may have other properties no apparent in the 4 dimensions we live in and have other undiscovered properties in other dimensions.  photons are indeed evil...