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### Quantum mechanics

The **quantum mechanics** describes the behavior of matter and energy with interactions of quanta on atomic and subatomic scale.

##### Explanation

It is a mathematical description method and not "the explanation of physics".

In nature no infinitely small objects exist. Infinitely large quantities do not exist either. Anyway you can calculate with it in mathematics. This can lead to absurd situations.

In quantum mechanics you always have to take the uncertainty principle into account. The effects of relativity can only be neglected if speeds do not come close to the speed of light.