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LED incapacitator

LED incapacitator is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand LED incapacitator rather than just read about it. In short: A light emitting diode (LED) incapacitator is a weapon designed like a flashlight. It emits an extremely bright, rapid, and well-focused series of "differently-colored random pulses".

LED incapacitator — main illustration
LED incapacitator — illustration

Key takeaways

  • LED incapacitator belongs to physics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect LED incapacitator to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of LED incapacitator from memory before moving on to harder problems.

Reference excerpt

A light emitting diode (LED) incapacitator is a weapon designed like a flashlight. It emits an extremely bright, rapid, and well-focused series of "differently-colored random pulses". Before human eyes can focus in on one frequency, another frequency comes on, causing intracranial pressure, which results in headache, nausea, vomiting, disorientation, irritability, and visual impairment to the target. The non-lethal weapon is intended as a means of protection by law enforcement officials such as police and border patrols. The light emitted is capable of rendering opponents temporarily blind so that they can be subdued more easily.

Description According to the United States Department of Homeland Security, the weapon works:

"By simultaneously overwhelming the subject both physiologically (temporarily blinding him) and psychophysically (disorienting him). A built-in range finder measures the distance to the nearest pair of eyeballs. Then, a "governor" sets the output and pulse train (a series of pulses and rests) to a level, frequency, and duration that are effective, but safe. The colors and pulses continuously change, leaving no time for the brain or eyes to adapt. After a few minutes, the effects wear off." The manufacturer, Intelligent Optical Systems (IOS), was awarded an $800,000.00 contract by the United States Department of Homeland Security's Small Business Innovation Research Office. As of August, 2007, the first phase of the contract, which called for the development of a prototype, has been completed. Later phases involve the testing of the prototype by the Institute of Nonlethal Defense at Pennsylvania State University, and the development of a production version, planned to be more compact and easier to carry. Bob Lieberman, president of IOS, said he envisions the device being used in "confrontations at border crossings with suspected illegal aliens or drug runners" among other possibilities. Projected users include "air marshals, border patrol agents, other officers with the Transportation Security Administration and customs officers" according to Gerald Kirwin of IOS. "In that few seconds, the officer has a tactical advantage and will actually close in to subdue or control the potential adversary," Lieberman said. The device can be used from ranges of up to 30 feet, while other non-lethal devices require an officer to approach the target much more closely, according to Lieberman. Glenn Shwaery, a researcher in nonlethal technology at the University of New Hampshire, said "If you disorient or distract somebody and cause them to look away, then they can't focus on their task, which could be aiming a weapon at someone, or looking at a screen with sensitive information, or dialing a phone." Shwaery says that an LED-based device could be safer than a laser-based device intended to achieve the same effects "Getting an eye-safe wavelength with a laser has been very difficult." Shwaery says that the presence of a range-finder and circuitry to modify the intensity of the light depending on the range in the LED device increases its safety. "The ideal goal for nonlethal technologies is that they be scalable." It was intended to be released to police, border patrol agents and National Guardsmen by 2010.

Deficiencies Some test subjects have been completely unaffected by the light, and although the manufacturer makes claims about the product's effectiveness, the CEO of Intelligent Optics, the producer of the device, has commented "I don’t think we've had anyone actually be sick." There is debate over how well the devices work and what their effects are.

Criticism Some critics have questioned the desirability of developing and deploying such a device for border security use. Deborah Notkin, president of the American Immigration Lawyers Association said: "It gives me pause, particularly in regards to Mexico. Mexico is a very important economic partner of ours. I would imagine that Mexico wouldn't be particularly happy with us using a device that would be more appropriate for criminals, not just for people trying to get across the border who are looking for better opportunities." Peter Herby, head of the legal division of the "mines-arms unit" at the International Committee of the Red Cross, suggests that such a device may raise many of the same issues as have arisen with laser-based blinding weapons, known as "dazzlers" because of the intense light with which they temporarily or permanently blind people. He also raises the issue of a possible black market in such weapons. "Once they're in the hands of bad guys are the police going to have to wear protective gear to prevent them[selves] from being dazzled?" Herby states that he is not familiar with this specific device. However Lieberman of IOS said: "We're taking great care to make sure the intensities we're using fall within eye-safe limit. We're doing medically supervised tests."

References

External links Sample, Ian (August 7, 2007). "The latest in the war on terror: the puke saber". Guardian Unlimited -- Science section. Guardian News and Media Limited. Retrieved 2018-12-03. By Singel, Ryan (July 26, 2007). "Homeland Security Funds LED Light Saber". Threat Level: Privicy, Security, and Crime Online. Wired Online (CondéNet, Inc). Retrieved 2007-08-08. THREAT LEVEL can only wonder how long will it be until war protesters and Rio Grande swimmers start wearing reflective clothing? "United States Patent 7,180,426 (without images)". "United States Patent 7,180,426 (via Google, with images)".

Illustrations

LED incapacitator: Cross-sectional diagram of the "Incapacitator", from a DHS newsletter[1]
Cross-sectional diagram of the "Incapacitator", from a DHS newsletter[1]

Worked examples

Example 1 — a first encounter with LED incapacitator

Start with the simplest possible case. Write down what LED incapacitator claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to LED incapacitator before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about LED incapacitator ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of LED incapacitator

In research
LED incapacitator appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses LED incapacitator in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
LED incapacitator is common in secondary-school and first-year university syllabi. It links to neighbouring topics Directed-energy weapons, Modern weapons, Non-lethal weapons, so understanding it makes those chapters shorter.
In everyday life
Look for LED incapacitator outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study LED incapacitator in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what LED incapacitator means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain LED incapacitator out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LED incapacitator in simple terms?

A light emitting diode (LED) incapacitator is a weapon designed like a flashlight. It emits an extremely bright, rapid, and well-focused series of "differently-colored random pulses".

Why does LED incapacitator matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study LED incapacitator?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on LED incapacitator.

Tags

  • Directed-energy weapons
  • Modern weapons
  • Non-lethal weapons
  • Weapons of the United States

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