Question

what is Quantum physics.

Answer 1

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The branch of physics concerned with quantum theory.
Quantum theory is the Therotical basis of modern physics that explains the nature and behaviour of matter and energy on the atomic and subatomic level. the nature or behaviour of matter and energy at that level is sometimes referred as quantum physics and quantum mechanics.
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Answer 2

Quantum theory is the Therotical basis of modern physics that explains the nature and behaviour of matter and energy on the atomic and subatomic level. the nature or behaviour of matter and energy at that level is sometimes referred as quantum physics and quantum mechanics.

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