The labyrinth requires____________________ floor space as a lightlock.
a. At least twice as much.
b. About half as much.
Over three times as much.
d. Approximately the same.
Which filter is normally used in a darkroom safelight with a 15-watt tungsten bulb?
An easy way to check safelight illumination is to use:
a. A film partially covered by cardboard.
b. A film and a white light source.
d. Low and high wattage light bulbs.
What effect, if any, does a light-colored wall have on indirect safelight illumination?
a. It increases the intensity.
It increases the fogging factor of exposed x-ray film.
d. It does not reduce the "safety" of indirect safelight illumination.