Probably those who first realized the activation and fixing of the nitrate salts needed to be done out of the light. Early pioneer photographers used tents for developing, thus they had wagon loads of equipment in order to document the new frontiers.
It depends on however big the room is
Dark Room - album - was created in 1980-06.
camera obscura
Who was the leader of the dark ages
Dark Chocolate was invented in 1593
No, electromagnetic rays are not present in a dark room. Electromagnetic rays are forms of light, so in a dark room there is no visible light present.
Dark Room - 2005 is rated/received certificates of: USA:PG
The Dark Room - 1982 is rated/received certificates of: Australia:R
In the Dark Room - 2013 is rated/received certificates of: Finland:S
Well Thomas Edison invented one main thing that changed mankind. He invented the light bulb. The light bulb (obviously) lights up the room if it is dark or makes a light place lighter.
Dark chocolate was invented in 1593
A way for a person to not be afraid of the dark if there is another room somwhere that is dark is to simply have mental power. It's best to remember that there is nothing in the dark that isn't there in the light.