physics

Reality Is Not What It Seems

Reality Is Not What It Seems 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 Reality Is Not What It Seems rather than just read about it. In short: Reality Is Not What It Seems: The Journey to Quantum Gravity (Italian: La realtà non è come ci appare. La struttura elementare delle cose) is an illustrated book by Italian physicist Carlo Rovelli.

Key takeaways

Reality Is Not What It Seems belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Reality Is Not What It Seems to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Reality Is Not What It Seems from memory before moving on to harder problems.

Reference excerpt

Reality Is Not What It Seems: The Journey to Quantum Gravity (Italian: La realtà non è come ci appare. La struttura elementare delle cose) is an illustrated book by Italian physicist Carlo Rovelli. The book discusses quantum gravity. It was first published in Italian in 2014 (before the author's best-seller Seven Brief Lessons on Physics). It was published in English in 2016 by which time the English translation of Seven Brief Lessons had already been released.

Structure The book's opening chapters trace the history and evolution of quantum gravity. Starting with pre-socratic philosopher Democritus through to the ideas of Sir Isaac Newton and, eventually, Albert Einstein, Rovelli puts forward a theory that quantum gravity brings great unity to the universe. Rovelli then states that space and time, waves and particles, energy and matter are all the same. Rovelli then seeks to disprove the concepts of continuity and infinity.

References

Worked examples

Example 1 — a first encounter with Reality Is Not What It Seems

Start with the simplest possible case. Write down what Reality Is Not What It Seems 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 Reality Is Not What It Seems 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 Reality Is Not What It Seems 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 Reality Is Not What It Seems

In research: Reality Is Not What It Seems 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 Reality Is Not What It Seems 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: Reality Is Not What It Seems is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2014 non-fiction books, Books by Carlo Rovelli, Italian non-fiction books, so understanding it makes those chapters shorter.
In everyday life: Look for Reality Is Not What It Seems 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 Reality Is Not What It Seems in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Reality Is Not What It Seems 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 Reality Is Not What It Seems out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Reality Is Not What It Seems in simple terms?

Reality Is Not What It Seems: The Journey to Quantum Gravity (Italian: La realtà non è come ci appare. La struttura elementare delle cose) is an illustrated book by Italian physicist Carlo Rovelli.

Why does Reality Is Not What It Seems 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 Reality Is Not What It Seems?

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 Reality Is Not What It Seems.