Which of the following scientists formulated the 'Uncertainty Principle', stating that exact position and momentum of an electron cannot be simultaneously known? MCQ with Answer and Explanation
Which of the following scientists formulated the 'Uncertainty Principle', stating that exact position and momentum of an electron cannot be simultaneously known?
A. Niels Bohr
B. Erwin Schrodinger
C. Max Planck
D. Werner Heisenberg
Answer: Option D
Solution (By JKSSB Mock Tests)
Werner Heisenberg, a German theoretical physicist, published his famous Uncertainty Principle in 1927. The principle dictates a fundamental limit to precision at the quantum level: the more precisely the position of a particle (like an electron) is determined, the less precisely its momentum can be known, and vice versa. Mathematically, delta_x * delta_p >= h/(4pi).
Explanation:
Electrostatic force acts between charges at a distance without contact. Gravity, magnetic force also non-contact. Friction and normal require contact.
Explanation:
Atomic number Z = number of protons. Mass number A = protons + neutrons. So neutrons = A - Z. Electrons = Z in neutral atom. Isotopes same Z, different N.
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