physics

Mirror Blocks

Mirror Blocks 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 Mirror Blocks rather than just read about it. In short: The Mirror Blocks, also known as the Mirror Cube and Bump Cube, is a type of combination puzzle and shape modification of the standard 3×3×3 Rubik's Cube and was invented in 2006. The puzzle's internal mechanism is nearly identical to that of the Rubik's Cube, although it differs from normal 3×3 cubes in that all pieces are the same color (typically reflective gold or silver stickers and/or tiles) and are identified…

Key takeaways

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

Reference excerpt

The Mirror Blocks, also known as the Mirror Cube and Bump Cube, is a type of combination puzzle and shape modification of the standard 3×3×3 Rubik's Cube and was invented in 2006. The puzzle's internal mechanism is nearly identical to that of the Rubik's Cube, although it differs from normal 3×3 cubes in that all pieces are the same color (typically reflective gold or silver stickers and/or tiles) and are identified by shape since each one is also a distinct rectangular prism. Like the Ghost Cube and Mastermorphix, the Mirror Blocks has a 3×3×3 shape, meaning that it can be solved the same way as the 3×3×3 Rubik's Cube. The fastest single solve for Mirror Blocks in a competition is 9.38 seconds and was achieved by Yutong Fang (方雨曈) in Xi'an, China on November 8, 2025.

Origin The Mirror Blocks was originally invented by Hidetoshi Takeji in 2006. He initially named the puzzle the "Bump Cube" due to it having an uneven, bumpy surface when scrambled. At a competition in Osaka, Hidetoshi showed his puzzle to a speedcuber who took great interest in it. Hidetoshi decided to lend his puzzle to the speedcuber, who showed it to a project group. In the fall of 2008, the puzzle was first mass-produced in Boston by Rubik's and manufactured by MegaHouse. When it was released, it was officially named the Mirror Blocks. Mirror Blocks have since been made by multiple manufacturers, and in versions with 4×4×4 and 5×5×5 mechanisms.

References

Illustrations

Worked examples

Example 1 — a first encounter with Mirror Blocks

Start with the simplest possible case. Write down what Mirror Blocks 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 Mirror Blocks 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 Mirror Blocks 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 Mirror Blocks

In research: Mirror Blocks 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 Mirror Blocks 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: Mirror Blocks is common in secondary-school and first-year university syllabi. It links to neighbouring topics Japanese inventions, Mechanical puzzle cubes, Rubik's Cube, so understanding it makes those chapters shorter.
In everyday life: Look for Mirror Blocks 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 Mirror Blocks in 20 minutes

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

Frequently asked questions

What is Mirror Blocks in simple terms?

Why does Mirror Blocks 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 Mirror Blocks?

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 Mirror Blocks.