Hi all,
I'm trying to find out some details on an experiment I recall from quite a
few years back in which a very small bead of glass(?) was balanced
vertically on the focused beam of a high powered laser.
Can anyone tell me some basic stats like: the power and wavelength of the
laser,and the mass of the bead used? Either that or a reference to a
website which has the info or a magazine link.
Also, while I'm at it, am I correct in saying that the dark adapted eye
responds to around five visible light photons per second striking a given
receptor cell?
Many thanks in advance.
Scott.