What is Heisenberg's Uncertainty Principle?
What are postulates of Planck's Quantum Theory?
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Source:Class XI Chemistry CBSE
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Answer:
In quantum mechanics, the uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which the values for certain pairs of physical quantities of a particle, such as position, x, and momentum, p, can be predicted from initial conditions.
His basic postulate was that a) atoms have sub-particles; and b) those operate, in gas, as oscillating (the start of wave function quantum) store of energy (the quantum of energy). The electron was not a known fact, but Planck proved that the atomic structure with separate subparticles (electrons) must exist.
Explanation:
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Explanation:
Heisenberg's Uncertainty Principle
It is one of the most celebrated results of quantum mechanics and states that one (often, but not always) cannot know all things about a particle (as it is defined by it's wave function) at the same time. This principle is mathematically manifested as non-commuting operators.
Postulates of Planck's Quantum Theory
At the time of Planck, it was not agreed that there were any particles within atoms.
The most critical was the revision of Rayleigh-Jeans thermodynamics that worked perfectly up to a certain temperature, but would got to infinity (obviously wrong). Wein has a similar option, but Planck got it correct.
His basic postulate was that a) atoms have sub-particles; and b) those operate, in gas, as oscillating (the start of wave function quantum) store of energy (the quantum of energy). The electron was not a known fact, but Planck proved that the atomic structure with separate subparticles (electrons) must exist.