Lights, telescopes, action Light is a form of energy, radiative energy. We feel the heat when standing in sunlight, we have solar power cells, etc.
Light passes through some things, like glass and air and water, and most of it goes through.
Like mirrors, projection screens, etc. The Nature of Light Depending on which experiments you do, light will act like either a wave or a particle called a photon . This is true for all waves, that the wavelength times the frequency equals the velocity of the wave. The lightwave carries energy. The shorter the wavelength, the greater the energy it carries.