Our third eye (আমাদের তৃতীয় চোখ)

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This document discusses the human eye and its ability to see light. It explores how the eye works as a sensor to collect light and transmit visual information to the brain. It also compares the eye to telescopes and other light-collecting instruments, examining how they use lenses and mirrors to focus and gather electromagnetic wavelengths, with the human eye naturally limited to collecting visible light but instruments able to detect other parts of the light spectrum.

Science

$So How can we see any type of light?  Refraction or Reflection of the Light wave to focus  Sensor to interact with the light$

If we could collect every wavelength of
light with our eyes..:’)

So what do you think? What is our
third eye?

The deepest challenges in human-computer interaction (HCI) lie in the human factor. Humans are complicated. We’re young, old, female, male, experts, novices, left-handed, right-handed, English-speaking, Chinese-speaking, from the north, from the south, tall, short, strong, weak, fast, slow, able-bodied, disabled, sighted, blind, motivated, lazy, creative, bland, tired, alert, and on and on. This week, we discuss the five classical human senses that are vision, hearing, taste, smell, and touch. Please download this material; please enjoyed it.

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General Principles of the Sensory Systems and Perception by Ken Koenigshofer, Ph.D. Copyright 2004 Imagine that your brain was isolated from the external world. Could you experience the world? The answer is "No." Could you direct your behavior successfully (adaptively) in the world if your brain was isolated from contact with the external world? Again the answer is "No." The brain, without sensory systems, is in fact isolated from the world. After all, the brain is inside your skull, hidden away from the external world. So, there must be systems that can get information about the external world into your head. We will consider several major ideas in this lecture. What I want to do is to give you several principles that apply in general to all of our sensory systems, and to the sensory systems of most animals as well (and perhaps life forms elsewhere in the universe if they exist). If you can understand these general principles it will be easier to learn the specific facts about each sensory system. In addition, your understanding of these general principles will also allow you to gain insight into some very interesting issues, some of which border on the philosophical. Have you heard the question posed, perhaps in a philosophy class, "If a tree falls in a forest and there is no one there to hear it, was there a sound?" You will be able to answer this and to explain the rationale for your unexpected answer to others who probably won't agree with you (you'll be able to convince them!). Well, let's get started. Sensory systems are the input systems to the brain. However, interestingly, the brain itself is completely insensitive to the external world in its raw forms. The brain uses neural code. It deals in neuron potentials. It cannot deal with the world in its raw forms. Energies in the external world must be converted into neuron potentials. Here's what I mean. Imagine that you are a neurosurgeon. Like others of your profession, when you do brain surgery, one of the first steps is to open up the skull of your patient under a local anesthetic, which deadens the scalp and the skull, but leaves your patient conscious and alert. The reason this is possible is because there are no pain receptors in the brain itself, but only in the surrounding scalp, skull, and meninges (a three-layered membrane covering the brain and attached to the skull). Now imagine, that with the skull opened up and the brain exposed, you direct a beam of light from a flashlight in the darkened surgery room at the visual area of the brain, at the rear of it's exposed surface (this is the primary visual cortex). To make this example even more clear, imagine that your patient is blindfolded. Would your patient "see" the light beam, which is now striking and flooding with illumination the visual cells of his or her brain? I think you can see that, obviously, the patient does not see the beam of light, even though the beam of light is flooding with illumination the ...

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