No there is no such part. Human are not photosynthetic
photosystem 1 or 2 i forget :(
Since photons are the basic unit of electromagnetic radiation, and since visible light is electromagnetic radiation, yes, photons within the visible light spectrum can be seen with the naked eye.
you cant. you can create a liquid that produces light, but because "light" is the photons from an object entering your eye, to create this liquid light ie liquid photons, the photons wouldnt leave the liquid and thus enter your eye.
photons
abdomen
neuron
adbomen
stigma
Gamma rays are high-energy photons.
soma
The iris is the coloured part of the eye.