NOTE: the blackboard advert was displayed outside a commercial outlet in Aberdeen. It was the reverse side of this. The NEON YELLOW PRESERVATION SOCIETY is a fictional society.
The porter’s bell is ringing: The NEON yellow Preservation Society:
The wavelengths of NEON light range from 400 nm to 750 nm. Yellow, orange, and red are thus bright, whilst other colours are almost impossible to see in this restricted … Continue reading wavelengths