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Why is it hard to see after going from bright light to dark light?
Wiki User
∙ 10y ago
It is difficult to see once entering a dark room after being in bright light because the pupils adjust how much light goes into the eye. In the sunlight, the pupils are tiny. In a dark room, the pupils need a few seconds to adjust to open wider.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoThe eye contains a circular muscle called the iris; the color of the iris is what people mean when they talk about eye color. The center of the iris is called the pupil; normally it looks black, and it is the opening that allows light into the eye. The iris has the capability of contracting, making the pupil smaller, or expanding, making the pupil larger. When you are in a brightly lit environment the iris contracts to prevent an excessive amount of light from entering the eye, and when you are in a dimly lit environment the iris expands to allow more light to enter the eye so that you can still see things. But it takes a little bit of time for the iris to react to changing light levels. So when you go from a bright area to a dark area, you eye needs some time to adjust to the new light level, and as a result, the iris will still be contracted for a time, in an environment which requires an expanded iris in order to see.
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What are the rods in the retina for?
Rods see light, cones see colour. That's why it's hard to see colour when it is dark because the rods are used more in the dark
Why does it takes time to see in a dimly lit room when you enter from a brightly lit area?
Your eyes are very clever pieces of equipment. The amount of light in a dark room compared to sun light is 1000s of times different, so your eyes need to adjust to the amount of light to allow you to see things. In the dark, it will increase the size of your iris, which lets light in to the eye. When its bright, the iris shrinks to let a smaller amount of light through. The increasing and decreasing of the iris can take several seconds to adjust which is why at first you cant see anything in a dark room. If too much light enters the eye, it will permanently damage the light sensors (the rentner) at the back of your eye render you blind.
Can you grow shiitake mushrooms in the dark?
Yes, however you may have a hard time getting them to fruit. They seem to require some light in order to fruit. Oklahoma State University has a "Growing Shittake Mushrooms" fact sheet that details how to grow and fruit mushrooms.
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All bones are light, marrow bones are soft and compact bones are hard.
Where is the coller bone in your body?
You know that hard bit along your shoulders and going along above your chest. Well that is it.
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Because in the dark, candles can only help you see a little bit. However, it is another thing if you have a glow in dark stuff it would be harder to see since the area would be too bright.
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Colours should also be contrasting. Light text on a light backround is hard to see. Dark text on a dark background is hard to see. So you need to get the mix of your colours right so that it is easier to read what you have.
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Usually they flash out red. Especially the large white rabbits. Another answer: The rabbit's eye colour doesn't change in a flash of sudden bright light. The pupils get smaller, but the colour doesn't change. What might make it look like a colour change is the light itself reflecting off the surface of the eye, causing a red colour -- but that is a trick of the light. Wild rabbits have dark brown eyes (so dark it can be hard to differentiate the pupil from the iris); pet rabbits do, too, but also sometimes they have red eyes or blue eyes.
Will a flashlight annoy animals?
Shining a flashlight at night will annoy nocturnal animals. Bright light hurts the eyes, and also ruins the night vision so that it is hard to see in the dark afterwards. That will annoy anyone. Bright lights also scare animals sometimes, because they don't understand what they are. This is why many animals get run over by cars after dark, because the lights make them too frightened to move out of the way.
Why is it hard to see when you got from a light to a dark place?
You have muscles in your eyes. The pupil widens when it needs more light, and gets smaller when it's in the dark. Your eyes need time to adjust.
What is Three dark lamps method?
There are 3 darks lamps that people use as light when they do it HARD
What element is a silvery solid and fairly hard and found in upset stomach remedies and burns with a bright light in air?
Magnesium...
Are nocturnal animals usually dark coloured?
yes I think so, because if they were bright colours they would be easier to see and it would be hard for them to hunt ect.
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It depends on the hen's diet.
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1.not transparent or translucent; impenetrable to light; not allowing light to pass through.2.not transmitting radiation, sound, heat, etc.3.not shining or bright; dark; dull.4.hard to understand; not clear or lucid; obscure: The problem remains opaque despite explanations.5.dull, stupid, or unintelligent.By:Bencon
Why does eyes hurts when entering a theater from bright area to dark areas?
Your eyes have to quickly adjust to the new light, which involves refocusing the lenses of your eye. An abrupt shift from one extreme to another forces the muscles to work extra hard for a few seconds, resulting in mild strain.
Need answer to this riddle what is long and hard has a steady stream of light runs on batteries and people grope for it in the dark?
A flashlight.
