chemistry

Lightwell

Lightwell is a chemistry 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 Lightwell rather than just read about it. In short: In architecture, a lightwell, sky-well, or air shaft is an unroofed or roofed external space provided within the volume of a large building to allow light and air to reach what would otherwise be a dark or unventilated area. Lightwells may be lined with glazed bricks to increase the reflection of sunlight within the space.

Key takeaways

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

Reference excerpt

In architecture, a lightwell, sky-well, or air shaft is an unroofed or roofed external space provided within the volume of a large building to allow light and air to reach what would otherwise be a dark or unventilated area. Lightwells may be lined with glazed bricks to increase the reflection of sunlight within the space. Lightwells may have sunlight reflecting mirrors on the top of light well. Lightwells serve to reduce the necessity for electric lighting, add a central space within the building, and provide an internal open space for windows to give an illusion of having a view outside.

Area or areaway

A subterranean lightwell by any frontage of a building for light to a basement is also called an area (or areaway in North American usage). This may also allow pedestrian access to the building separate from a main door.

Ancient history The lightwell was used in ancient civilizations, such as the Egyptians and at the Palace of Knossos on Minoan Crete. There are also instances of lightwell use by the Romans, such as the impluvium and compluvium shaft. In traditional Chinese architecture, the 天井 (sky well) also exists.

Illustrations

Worked examples

Example 1 — a first encounter with Lightwell

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

In research: Lightwell appears in chemistry 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 Lightwell 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: Lightwell is common in secondary-school and first-year university syllabi. It links to neighbouring topics Architectural element stubs, Lighting, Solar architecture, so understanding it makes those chapters shorter.
In everyday life: Look for Lightwell 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Lightwell in 20 minutes

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

Frequently asked questions

What is Lightwell in simple terms?

Why does Lightwell matter?

Because it connects several chemistry 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 Lightwell?

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 Lightwell.