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In dim light, your pupil expands. In bright light, your pupil contracts. Your pupil contracts in bright light because not as much light is needed to see. Same thing with dim light, your pupil expands in dim light because there is more light needed to see. Because there is not as much light in a closet than in an open field your pupil contracts and expands to let in more light or let in less light, depending on were you are at and how dark it is.
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Does a balloon expands or contract when put in the refrigerator where it is cold?
It contracts.
When does pupil contract?
The pupil contracts when they are exposed to bright light (ie: the light is off for a period of time and then you turn it on). Metallic Thunder
Matter expands when it gets hotter and contracts when it cools?
The explanation of Thermal Expansion.
Does an iron ring expands or contracts on heating?
Most materials expand when heated.
Compare and contrast conduction and convection?
convection means when something is heated it expands or conducts eg. metal is heated it contracts when it is cooled it contracts.
Where does the iris go when your pupil dilates?
The surrounding tissue just expands and contracts with pupil ajustment
What happens when The radial muscles of the iris contract?
When the eye is stimulated by bright light, the circular muscle of the iris contracts, decreasing the size of the pupil.
What controls the amount of light that enters the eyes?
The pupil contracts or expands (dilates) to regulate the entry of light to the retina in the eye.The iris or colored part of the eye is what controls the diameter of the pupil by covering or uncovering it.
Pupil gets larger it dilates pupil gets smaller it?
Contracts
What is the part of the eye that adjusts to let light enter called?
lens, the concave disk held by the ciliary muscles, found behind the opening of the pupil, can't miss it!
What happened to it when the light was flashed into eye?
When the eye detects bright light, the iris expands causing the hole at its centre (the pupil) to shrink in size. The brighter the light the smaller the pupil becomes. This happens because, in a dark place, the eye needs to take in as much light as possible to see better so the pupil expands; in a light place, the eye could be damaged due to over exposure to light so the pupil shrinks. The scientific word for "shrinks" is "contracts"
What is the ring around your pupil called?
The colored bit is called the iris, and is actually a muscle. it expands and contracts to make the pupil (black bit) either smaller or larger, depending how much light there is. the brighter the outside would is, the smaller the pupil gets.
Does pupil size remain constant while focusing fixed near point object?
Yes, pupil size should not be affected by the focal distance, unless there is a change in the amount of light at that distance. To change focal distance, the lens contracts or expands. The pupil dilates and constricts based upon how much ambient light there is.
Does a thermometer's mercurry expand contract on condenses?
it expands and contracts when the temperature drops, the mercury contracts...when the temperature increases, the mercury expands
What state of matter expands with cold and contracts with heat?
Well, solids. For example, when you heat up metal is expands and when you freeze it, it contracts
The result of the pupil of your eye in a dark room?
Your pupil expands in the dark in order to obtain more light.
Which organ of the respiratory system expands and contracts automatically to force air into and out of the lungs?
The diaphragm expands and contracts automatically, forcing air into and out of the lungs.
