I have been on hold for over 2 hours on 2 separate days, with no option to leave a callback number. I have sent emails, and still no reply. How do they think I can pay my insurance premiums if they don't send me my invoice or log-in credentials to log into their system. This...
You could say “put all the records on punch cards and store them in a secret vault”. That’s fine as long as no one needs to use the records ever (see Raiders of the Lost Ark or Indiana Jones and the Kingdom of the Crystal Skull). It’s much less workable when you have 3000-...
If such a signal is used to drive the gate input the gate is opened (or closed) by the individual photons rather than by the whole light pulse. If the use of a PMT for gating cannot be avoided (e.g. due to low intensity), the gain of the PMT should be reduced until a ...