“The Knowledge Library”

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An Initiative by: Kausik Chakraborty.
03/12/2022 12:10 AM

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Objective Questions on Tughlaq Dynasty (तुगलक वंश)🟢Objective Questions On Bharat me Europeano Ka Aagman (भारत में यूरोपियनों का आगमन)🟢भारतीय संविधान के विकास का इतिहास🟢1873 का चार्टर एक्ट🟢साइमन कमीशन🟢Cabinet Mission(कैबिनेट मिशन), 1946🟢माउंटबेटन योजना(Mountbatten Plan)🟢Important Points about Constituent Assembly of India🟢Constituent Assembly MCQ (संविधान सभा का वस्तुनिष्ठ प्रश्न)🟢Preamble of Indian constitution MCQ (भारतीय संविधान की प्रस्तावना वस्तुनिष्ठ प्रश्न)🟢Sources of Indian Constitution🟢Objective questions on Source of Indian Constitution (भारतीय संविधान के स्रोत का वस्तुनिष्ठ प्रश्न)🟢Schedule of Indian Constitution(भारतीय संविधान की अनुसूची)🟢Schedule of Indian constitution questions (भारतीय संविधान की अनुसूची का प्रश्न)🟢भारतीय संविधान के भाग(Parts of Indian Constitution)🟢MCQ On Parts of Indian Constitution (भारतीय संविधान के भाग का वस्तुनिष्ठ प्रश्न)🟢MCQ on the union and its territory (संघ एवं उसका राज्यक्षेत्र का वस्तुनिष्ठ प्रश्न)🟢Important Points About Indian Citizenship(भारतीय नागरिकता)🟢Objective Questions Of Indian Citizenship (भारतीय नागरिकता का वस्तुनिष्ठ प्रश्न)🟢शोषण के विरुद्ध अधिकार(Right against exploitation)

“The Knowledge Library”

Knowledge for All, without Barriers…

 

An Initiative by: Kausik Chakraborty.
Objective Questions on Tughlaq Dynasty (तुगलक वंश)🟢Objective Questions On Bharat me Europeano Ka Aagman (भारत में यूरोपियनों का आगमन)🟢भारतीय संविधान के विकास का इतिहास🟢1873 का चार्टर एक्ट🟢साइमन कमीशन🟢Cabinet Mission(कैबिनेट मिशन), 1946🟢माउंटबेटन योजना(Mountbatten Plan)🟢Important Points about Constituent Assembly of India🟢Constituent Assembly MCQ (संविधान सभा का वस्तुनिष्ठ प्रश्न)🟢Preamble of Indian constitution MCQ (भारतीय संविधान की प्रस्तावना वस्तुनिष्ठ प्रश्न)🟢Sources of Indian Constitution🟢Objective questions on Source of Indian Constitution (भारतीय संविधान के स्रोत का वस्तुनिष्ठ प्रश्न)🟢Schedule of Indian Constitution(भारतीय संविधान की अनुसूची)🟢Schedule of Indian constitution questions (भारतीय संविधान की अनुसूची का प्रश्न)🟢भारतीय संविधान के भाग(Parts of Indian Constitution)🟢MCQ On Parts of Indian Constitution (भारतीय संविधान के भाग का वस्तुनिष्ठ प्रश्न)🟢MCQ on the union and its territory (संघ एवं उसका राज्यक्षेत्र का वस्तुनिष्ठ प्रश्न)🟢Important Points About Indian Citizenship(भारतीय नागरिकता)🟢Objective Questions Of Indian Citizenship (भारतीय नागरिकता का वस्तुनिष्ठ प्रश्न)🟢शोषण के विरुद्ध अधिकार(Right against exploitation)

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Why Do Your Pupils Get Bigger in the Dark?

If you’ve ever noticed this phenomenon, you’re not just imagining things. A part of your eye does indeed get bigger in the dark. What are we talking about? The pupil, of course!

To learn why this happens, we need to know a bit more about the eye itself. The outer part of your eye that you can see and feel is called the cornea. Just behind the cornea sits the iris, a circular membrane that gives your eyes their color.

The iris plays an important role in the proper functioning of the eye. Its job is to control the amount of light that enters the eye through your pupil, which is the opening in the middle of the iris that looks like a black circle.

Why is this role so important? Like a camera depends upon light to capture vivid images, your eyes depend upon the correct amount of light to see properly. During the day, less light is needed to see the things around you. At night, however, more light is usually needed to see things you might have seen easily during the day.

To control the amount of light entering the eye, the iris widens or narrows to change the size of the pupil. For example, when it’s dark, the iris widens and the pupil dilates or gets bigger, to allow as much light as possible to enter the eye.

The opposite occurs during the day. When the Sun is shining bright, the iris narrows and the pupil constricts or gets smaller. This restricts the amount of light entering the eye, allowing only enough light to see properly.

The amount of light can vary wildly throughout the day and into the night. Your pupils respond and react accordingly as light levels fluctuate. The size of the pupil can change in size from as little as 1.5 millimeters to over 8 millimeters in diameter.

In addition to controlling the amount of light that enters the eye, your pupils can also change size in response to emotional stimuli. If you’re mad or afraid or even in love, your pupils can change in size as your body feels these emotions.

Your pupils can also constrict and dilate as a result of a variety of medicines and drugs. In fact, doctors will often shine a light into a patient’s eyes to test the reaction of the pupil to determine whether the body appears to be functioning properly.

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