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Laser weapon

Laser weapon 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 Laser weapon rather than just read about it. In short: A laser weapon is a type of directed-energy weapon (DEW) that uses lasers to inflict damage. Laser weapons are of two types: low-power laser dazzlers that blind optical systems or human eyes, and high-power lasers that can physically damage or destroy targets, such as enemy aircraft, drones, and missiles.

Laser weapon — main illustration
Laser weapon — illustration

Key takeaways

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

Reference excerpt

A laser weapon is a type of directed-energy weapon (DEW) that uses lasers to inflict damage. Laser weapons are of two types: low-power laser dazzlers that blind optical systems or human eyes, and high-power lasers that can physically damage or destroy targets, such as enemy aircraft, drones, and missiles. One of the major issues with laser weapons is atmospheric thermal blooming, which is still largely unsolved. This issue is exacerbated when there is fog, smoke, dust, rain, snow, smog, foam, or purposely dispersed obscurant chemicals present. In essence, a laser generates a beam of light that requires clear air or a vacuum to operate.

Low-power lasers have the potential to serve as non-lethal weapons. They can cause temporary or permanent vision loss. The extent, nature, and duration of visual impairment depend on factors including the laser's power, wavelength(s), beam collimation and orientation, and duration of exposure. Lasers with a power output of less than one watt can cause permanent vision loss. The Protocol on Blinding Laser Weapons bans weapons designed to cause permanent blindness. Weapons designed to cause temporary blindness, known as dazzlers, are in a separate category. Multiple incidents of pilots exposed to lasers while flying have been recorded. High-power laser weapons capable of damaging or destroying a target are experimental as of 2026. The use of laser-beam weaponry to destroy aerial targets has been under development for years. The United States Navy tested short-range (1 mile), 30-kW Laser Weapon System or LaWS for use against targets such as small UAVs, rocket-propelled grenades, and visible motorboat or helicopter engines. A 60 kW system, HELIOS, was under development for destroyer-class ships as of 2020. India's DRDO successfully tested a 30 kW DEW, designated Mk-II (A) DEW, in April 2025 which could disable drones at a range of 5 km.

Air defense systems DEW for the destruction of incoming missiles are under development. One example is Boeing Airborne Laser, deployed inside a Boeing 747 and designated as YAL-1. This system was designed to eliminate short- and intermediate-range ballistic missiles during their boost phase. It was canceled in 2012. Another system was studied under the Strategic Defense Initiative (SDI) and successor programs. This project aimed to employ ground-based or space-based laser systems to destroy incoming intercontinental ballistic missiles (ICBMs). However, various practical challenges, such as aiming a laser over a large distance through the atmosphere, complicated implementation. Optical scattering and refraction bent and distorted the beam, complicating aiming and reducing its efficiency. A related concept was the nuclear-pumped X-ray laser, an orbiting atomic bomb surrounded by laser media in the form of glass rods. When a bomb detonated, the rods would be exposed to highly-energetic gamma-ray photons, causing spontaneous and stimulated emission of X-ray photons within the rod atoms. This process would result in optical amplification of the X-ray photons, generating an X-ray beam that was little affected by atmospheric distortion and capable of destroying ICBMs in flight. However, the X-ray laser became a single-use device, as it would destroy itself upon activation. Some initial tests were conducted with underground nuclear testing, but the results were not promising.

Iron Beam

Iron Beam is a laser-based air defense system which was unveiled at the Singapore Airshow on 11 February 2014 by Israeli defense contractor Rafael Advanced Defense Systems. The system is designed to destroy short-range rockets, artillery, and mortar bombs; it has a range of up to 7 km (4.3 mi), too close for the Iron Dome system to intercept projectiles effectively. In addition, the system could also intercept unmanned aerial vehicles (UAVs). Iron Beam will constitute the sixth element of Israel's integrated air defense system, in addition to Arrow 2, Arrow 3, David's Sling, Barak 8, and Iron Dome. Iron Beam uses a fiber laser to destroy an airborne target. Whether acting as a stand-alone system or with external cueing as part of an air-defense system, a threat is detected by a surveillance system and tracked by vehicle platforms in order to engage. Iron Beam is expected to be operational by the end of 2025.

Anti-drone systems

… excerpt ends here. Continue reading the full article.

Illustrations

Laser weapon: The US-Israeli Tactical High Energy Laser (THEL) was used to shoot down rockets and artillery shells before being canceled in 2005 as a result of "its bulkiness, high costs and poor anticipated results on the battlefield".[1]
The US-Israeli Tactical High Energy Laser (THEL) was used to shoot down rockets and artillery shells before being canceled in 2005 as a result of "its bulkiness, high costs and poor anticipated results on the battlefield".[1]
Laser weapon: The YAL-1, a modified Boeing 747, owned by USAF. It was canceled in December 2011 and scrapped in September 2014.
The YAL-1, a modified Boeing 747, owned by USAF. It was canceled in December 2011 and scrapped in September 2014.
Laser weapon: USS Preble (DDG-88) firing her HELIOS laser system, 3 February 2025
USS Preble (DDG-88) firing her HELIOS laser system, 3 February 2025
Laser weapon: PHASR Rifle
PHASR Rifle
Laser weapon: The Beriev A-60 is still experimenting with the Sokol Eshelon laser as an intended anti-satellite weapon.
The Beriev A-60 is still experimenting with the Sokol Eshelon laser as an intended anti-satellite weapon.

Worked examples

Example 1 — a first encounter with Laser weapon

Start with the simplest possible case. Write down what Laser weapon 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 Laser weapon 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 Laser weapon 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 Laser weapon

In research
Laser weapon 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 Laser weapon 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
Laser weapon is common in secondary-school and first-year university syllabi. It links to neighbouring topics Directed-energy weapons, Laser applications, so understanding it makes those chapters shorter.
In everyday life
Look for Laser weapon 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 Laser weapon in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Laser weapon 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 Laser weapon out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Laser weapon in simple terms?

A laser weapon is a type of directed-energy weapon (DEW) that uses lasers to inflict damage. Laser weapons are of two types: low-power laser dazzlers that blind optical systems or human eyes, and high-power lasers that can physically damage or destroy targets, such as enemy aircraft, drones, and mi…

Why does Laser weapon 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 Laser weapon?

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 Laser weapon.

Tags

  • Directed-energy weapons
  • Laser applications

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