science

Stun grenade

Stun grenade is a science 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 Stun grenade rather than just read about it. In short: A stun grenade, also known as a flash grenade, flashbang, thunderflash, or sound bomb, is a non-lethal explosive device used to temporarily disorient an enemy's senses. Upon detonation, a stun grenade produces a blinding flash of light and an extremely loud "bang".

Key takeaways

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

Reference excerpt

A stun grenade, also known as a flash grenade, flashbang, thunderflash, or sound bomb, is a non-lethal explosive device used to temporarily disorient an enemy's senses. Upon detonation, a stun grenade produces a blinding flash of light and an extremely loud "bang". They are often used in close-quarters combat, door breaching, and riot control, typically to stun enemies or distract them. Originally developed to simulate explosions during military training, stun grenades were first used by the British Army Special Air Service's counterterrorist wing in the late 1970s, and have been used by police and military forces worldwide since. Despite their less-lethal nature, stun grenades are still capable of causing harm, and can injure or kill when detonating in close proximity. They are also capable of sparking fires.

Effects Stun grenades are designed to produce a blinding flash of light of around 7 megacandela (Mcd) and an intensely loud "bang" of greater than 170 decibels (dB).

Construction Unlike a fragmentation grenade, stun grenades are constructed with a casing designed to remain intact during detonation and avoid fragmentation injuries, while having large circular cutouts to allow the light and sound of the explosion through. The filler comprises a pyrotechnic metal-oxidant mix of magnesium or aluminium and an oxidizer such as potassium perchlorate or potassium nitrate.

Hazards While stun grenades are designed to limit injury, permanent hearing loss has been reported. The concussive blast has the ability to cause injuries, and the heat generated may ignite flammable materials. The fires that occurred during the 1980 Iranian Embassy siege in London were caused by stun grenades.

See also Blast ball – Less-lethal hand grenade Dazzler – Non-lethal temporary blindness weapon M84 stun grenade – American less-lethal pyrotechnic NICO BTV-1 flash-bang grenade – Flash-bang grenade used in the United States Smoke grenade

References

External links

FM 3-23.30 Grenades and Pyrotechnic Signals. GlobalSecurity.org, 1 September 2000. Ch. 1, Sec. 10. "Stun Hand Grenades". Retrieved on 26 May 2011.

Illustrations

Stun grenade: M84 stun grenade — M84 stun grenade

Worked examples

Example 1 — a first encounter with Stun grenade

Start with the simplest possible case. Write down what Stun grenade claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Stun grenade 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 Stun grenade 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 Stun grenade

In research: Stun grenade appears in science 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 Stun grenade 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: Stun grenade is common in secondary-school and first-year university syllabi. It links to neighbouring topics British inventions, Stun grenades, so understanding it makes those chapters shorter.
In everyday life: Look for Stun grenade 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 Stun grenade in 20 minutes

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

Frequently asked questions

What is Stun grenade in simple terms?

Why does Stun grenade matter?

Because it connects several science 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 Stun grenade?

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 Stun grenade.