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If you are meaning black and white or colour films there has to be no light what so ever. Paper printing black and white prints can be done under safelight conditions, usually a deep yellow/orange safelight. Colour printing should be in total darkness.
ordinary black & white? yellow or red
panchromatic black & white? no light
color? no light
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∙ 11y ago
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What has to occur for us to see color?
colour must occur in one of three ways: light must be refracted off a surface. light must pass through a fliter or prism or liquid. light must be projected. Of the correct wavelength to produce a colour. the light must then pass into the back of the eye and hit the rods and cones at the back of the eye. Then the brain must process the image through the optic nerve.
What colour you must choose for curtain because your wall is light blue?
white brown or tan
What is the color of alpha radiation?
Alpha radiation does not have a colour. In order for something to have a colour, it must emit rays of visible light. Alpha radiation and light are two different things which have little to do with each other.
Why do things look a different colour in different light?
You see only reflected light. If the light source changes, then the light that bounces off any object (that you see) must also change.
What colour light must be shown on a power boat at night?
A green light starboard side of bow, a red light port side of bow, and a white light - elevated higher than the other two - from the stern.
How do you unlock the Photographer's House in Professor Layton and Pandora's Box?
You must have completely put the camera together again, Plus:(must have taken 9 photographs and spotted all the differences)Please see the Related link below for a walkthrough of puzzle.
When the Lone Ranger photographs his horse's fillings in the mirror he must wonder why this?
silver
Most popular car colour in the world?
The most popular car colour of the world is blue.Because blue is the colour of the sea and cars must have such a colour like that.Also,blue is peaceful colour and it doesh't remember war at the car owner.So your car colour must be blue (if you have a car).
What type of economy does developing country have?
I think they must have a mixed economy
Why the color of the water in the deep part of the ocean is black?
Colour is the perceived result of the interaction of light with the sensitive receptors in our eyes. For there to be colour, there must be light. While water appears to be transparent, it is not totally so, and large volumes of it are opaque - they don't let light penetrate. So, at the depths of the ocean there is no light, and therefore no colour. What we perceive as white is actually the total reflection of white ligth by an object, Black is either the total absence of light or the total absoption of white light by an object - so black ink absorbs all white light, but the bottom of the ocean is total darkness. So, the water is not actually a different colour as we descend, it is the different quantities of light which make it appear darker and darker as we go deeper.
Can solar flares change the colour of light because light particles gain their colour from their frequency and different solar flares may send out light waves with different frequencies?
Solar flares are sudden brightening of the sun caused by ejection of huge energies. Solar flares will most likely not affect the colour light because solar flares produces radiation across the electromagnetic spectrum at all wavelengths, from radio waves to gamma rays. Thus, it is difficult to view solar flares on the visible spectrum and must be viewed with special instruments.In other words, photons (light particles/waves) from a solar flare are emitted at all frequencies along the electromagnetic spectrum and must be viewed with special equipment. Unless the solar flare interacts with anything else (maybe other atmospheres), they don't change the colour of light.
For a developing country to improve economically...it must have?
capital
