i think its the retina
photosensitive receptor.cones and rods.cones work in bright light and are sensitive to colours whereas rods work in dim light and are not sensitive to colours
Safelights are used when printing. They're made to produce only light of a color the paper being used isn't sensitive to.
It would be dark because X-ray light does not reach Earth's surface.
No, they prefer the dark but they can survive in indirect sunlight.
do they like sleeping in the dark only or with light
The two kinds of receptor in the eye are rods and cones. Rods only see in black and white but are very light sensitive (that's why you see in black and white when it is almost dark) and cones which allow you to see in colour.
Red, green, and blue light. Rods are only sensitive to black and white.
there is no such thing as dark, only the absence of light.
Rods in the eye are sensitive to light intensity but do not see color. They are responsible for vision in low light conditions.
Rods and cones are the recepters at the back of your eye that turn the light into signals for the brain to understand. The cones are sensitive to colour, and add colour to the picture you see, while the rods are sensitive to light and dark. The rods are more sensitive than the cones, so at dim light levels they can still make out an image, while the cones cease to operate effectively. This means you can still see an image at a dim light level, though you won't be able to distinguish colour properly.
False. The light reactions of photosynthesis require light to convert solar energy into chemical energy, while the dark reactions (Calvin cycle) do not directly rely on light and can occur in both light and dark conditions. However, the dark reactions are indirectly dependent on the products of the light reactions.
Antarctica would be the only desert that is dark in the winter.