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en.wikipedia.org/wiki/Stimulus_(physiology)

In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external ... The absolute threshold for touch is the minimum amount of sensation needed to ... Vision provides opportunity for the brain to perceive and respond to changes ... it is said to not reach absolute threshold, and the body does not react.

www.answers.com/Q/The_amount_of_time_it_takes_a_person_to_perceive_a_stimulus_and_react_to_it

reaction time ----a+ foolThe amount of time it takes a person to perceive a stimulus andreact to it is averagely 1 to 1.5 seconds.

plato.stanford.edu/entries/consciousness-temporal/empirical-findings.html

Delays: how long does it take for a stimulus to reach (or produce) consciousness ? .... a subject to react to a signal as soon as they perceive it – by pressing a button, ... the amount of time it takes messages leaving the brain to result in a muscular ... time needed to see and respond to a traffic light changing to red, or someone ...

www.nanosonic.com/wp-content/uploads/2017/07/Module-1_Crash-Prevention_Lesson-1-Physics-and-Reaction-Time_Lesson-Plan_HS.pdf

and practical reaction time limits affect how driving and driving safety can ... This equation calculates the distance an object travels given a certain amount of time. ... based on a student's reaction to a visual stimulus (seeing a fly on the radar) versus ... The time it takes for someone to see or perceive a problem and react to it.

courses.missouristate.edu/tomtomasi/tom/bio%20361/bio%20361%20senses%20lab.pdf

When a constant stimulus is applied to a ... sensory receptors to respond to a wide range of stimulus ... pressure sensation return, and if so, how long does it ... Does it take more weight for a person to perceive a .... The pupil regulates the amount of light entering ... the photopigment in these cells react with light, it alters .

www.fidnet.com/~weid/psych8notes.htm

Sensation: when a stimulus activates receptor cells. ... Absolute threshold: the minimum amount of physical energy required to produce a sensation at ... Sensory deprivation: occurs whenever a person is denied the use of one or more senses .... This damage takes place over time, so it is ..... (Animals will react like kids too.).

www.reddit.com/r/askscience/comments/43f625/what_is_the_minimum_amount_of_time_a_human_can

It's regularly stated that someone next to a detonating nuclear bomb would feel nothing. But what would be the minimum amount of time needed to... ... It takes in the order of hundreds of milliseconds to react to stimuli, so a ...

www.visualexpert.com/Resources/reactiontime.html

In many cases, the speed with which a person can respond, "reaction time," is the key ... the numbers originate, how they were obtained or the variables that affect them. ... This is the time it takes for the responder to perceive that a signal has .... The stimulus-response capability overrides and the driver simply cannot take the  ...

www.dailymail.co.uk/sciencetech/article-2542583/Scientists-record-fastest-time-human-image-takes-just-13-milliseconds.html

Jan 20, 2014 ... Newly recorded speed is almost eight times faster than the 100 milliseconds recorded by previous studies; Part of the ... THE STUDY IN NUMBERS. 13 milliseconds is the time it takes for the human eye to process an image.