science

Photoflash bomb

Photoflash bomb 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 Photoflash bomb rather than just read about it. In short: A photoflash bomb, or flash bomb, is explosive ordnance dropped by aircraft, usually military surveillance aircraft, designed to detonate above ground to create an extremely bright flash of light. These bombs, which are capable of producing light at an intensity of up to hundreds of millions of candlepower, assist surveillance aircraft in taking nighttime aerial photos without the need to fly low to the ground which…

Key takeaways

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

Reference excerpt

A photoflash bomb, or flash bomb, is explosive ordnance dropped by aircraft, usually military surveillance aircraft, designed to detonate above ground to create an extremely bright flash of light. These bombs, which are capable of producing light at an intensity of up to hundreds of millions of candlepower, assist surveillance aircraft in taking nighttime aerial photos without the need to fly low to the ground which would make them vulnerable to possible enemy detection. Due to the advent of better nighttime optics, satellite imagery, and stealth aircraft, these bombs are no longer used by the military.

Construction There were several models of photoflash bombs, but most had a similar construction and makeup. For example, the M23A1 was constructed of a cardboard tube, capped on both ends with metal "plugs." The tube was then filled with a flash powder "charge" and a fuse. The fuse would be attached to the hanging wire using a standard friction wire, which would ignite the flash powder after a specified delay. In this specific model of ordnance, the flash would last approximately 1/5th of a second after detonation.

Recent events On 19 July 2015, a World War II-era M122 (45 kg or 100 lb) photoflash bomb washed ashore at St. Pete Beach, Florida, U.S. This led authorities to evacuate the beach and several nearby homes. An Explosive Ordnance Disposal team from MacDill Air Force Base responded to the scene and detonated the device.

Illustrations

Worked examples

Example 1 — a first encounter with Photoflash bomb

Start with the simplest possible case. Write down what Photoflash bomb 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 Photoflash bomb 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 Photoflash bomb 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 Photoflash bomb

In research: Photoflash bomb 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 Photoflash bomb 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: Photoflash bomb is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bombs, History of photography, Photographic techniques, so understanding it makes those chapters shorter.
In everyday life: Look for Photoflash bomb 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 Photoflash bomb in 20 minutes

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

Frequently asked questions

What is Photoflash bomb in simple terms?

Why does Photoflash bomb 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 Photoflash bomb?

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 Photoflash bomb.