I was watching this programe about new inventors and there was this one guy who was talking about the way energy from the light goes into the eye where its converted into a signal and its intercepted by the nervous system. Now this guy was actualy talking about how the photon is transmitted into through the neurone itself not an actual conversion of the photon into electrical impulse by the photosystems in the retina which are the 2 the rods and cones. The way these 2 photosystems work in 2 different frequencies ie dark and light make sense to me. i was actually curious to know more about this so called theory if anyone likes to fill me in. Is it possible that the actuall photon itself it transmited through the eye and passed these photosstems. Im really unclear on how a photon could be transmitted from the retina to the brain. Maybe the dude was on crack :bugeye: its a biophysics material so i thought id post here.

thanks

Perhaps he was talking metaphorically? The light photon stops at the receptor cell.

The photon dissapears when it is absorbed at the retina. Its energy and frequency does however get transferred to an electric signal which carries the information to the brain.

so can we say the photon acts as a particle unitll it meets the retina and then it transfered as a signal or wave after that? This seems like the dual property that the photon has, why couldnt the proton actually travel further through?

No it is not a photon at all anymore. Photons can be defined as being carriers of electromagnetic energy which is received by the receptors in the eye. What is sent to the brain however is a much amplified electric signal which is created at nerve synapses.