[isomerizationRate] =
IsomerizationsFromAbsorbtions(photonAbsorptionRate,[quantalEfficiency])
Compute isomerization rate, R* per photreceptor per sec, given
photon absorption rate and photopgiment quantal efficiency.
Default value for quantalEfficiency is inherited from
PhotopigmentQuantalEfficiency
called with type 'Generic'.
06/11/03 lyin Rewrote it.
06/23/03 dhb Change name, made quantalEfficiency an argument.
07/25/03 dhb Take default value from data routine.
Psychtoolbox/PsychColorimetric/IsomerizationsFromAbsorptions.m