Light on luminosity?
Sad to know this idiocy over radioactive instruments is still on-going. Some years ago I described (if not on this thread, then somewhere else in the Prune library) how on a visit to Cosford I was admitted to the York’s interior but not allowed to approach the pilots’ seats ‘on account of ‘’radiation risk from the flight instruments’’. On pointing out I had spent some hundreds of hours scrutinising said instruments at close quarters but was still in good health, I was informed that luminous paint became increasingly radioactive with age. Personally I had always thought that such emissions decayed with time rather than the reverse, so is there any good reason why old aircraft instruments should be subject to a diametrically opposite rule or is it a dodge by curators to keep the public out of their exhibits’ most interesting area?