if the intensity of a (visible) light beam is increased, how does that light change to our eyes (and instruments)?'

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The pupil widens when the intensity of a (visible) light beam is increased.The pupil is an opening that lets light into your eye. Since most of the light entering your eye does not escape, your pupil shows up dark. In the dim light, your understudy extends to permit more light to enter your eye. In shining light, it contracts. Light identified by the retina of your eye is changed over to nerve motivations that travel down the optic nerve. A few of these nerve impulses go from the optic nerve to the muscles that control the estimate of the understudy. More light makes more driving forces, causing the muscles to shut down the student. A portion of the optic nerve from one eye crosses over and couples with the muscles that control the understudy measure of the other eye. That’s why the student of one eye can alter after you sparkle the light into your other eye. When intense light beams reach your eye, the iris reacts by constricting the pupil, hence securing the retina and making a difference in preparing the approaching picture superior. The opposite happens in low light when the iris widens the pupil to permit as much light as conceivable.To know more about pupil refer to the  link https://brainly.com/question/6848649?referrer=searchResults.#SPJ4