What a tracer should look like (before spazzing just look).

[ATAG_Dutch]

Originally Posted by yellonet

According to Bliss' experience that is impossible. You must have imagined it.

I suppose that what I was trying to point out here is that the physical behaviour of a tracer round in a geometrical sense is quite distinct from the retinal after image of any bright object in darkness.

If I remember optometry college rightly, (it's along time ago and I don't work in the industry anymore) the after image is caused by the bright object bleaching out the 'visual purple' pigment which stimulates the nerve impulse to the brain, and the after image stays until this pigment is regenerated by the cone cells of the retina. (if anyone is more knowledgable than this I'll stand corrected, a previous career can be like a previous life sometimes!).

I haven't followed Bliss and Winny's argument in detail, but I was just wondering whether this was the missing factor in establishing a common ground.