Question

Newton's laws of classical mechanics are replaced in quantum mechanics by.....

• A. Snell's Law
• B. Schrödinger's equations
• C. Maxwell's equations
• D. Laplace equation

Hint:

Newton → Classical motion; Schrödinger → Quantum motion (wavefunctions, probabilities).

Answer 1

The Correct Option is B

Step 1: Classical versus quantum mechanics.
- Newton's laws govern macroscopic motion.
- At the atomic level, wave-particle duality invalidates Newton's framework.
Step 2: Quantum mechanical framework.
The time-dependent Schrödinger equation: \[i \hbar \frac{\partial \Psi}{\partial t} = \hat{H} \Psi\] models the time evolution of the wavefunction \(\Psi\).
Step 3: Conclusion.
Therefore, Schrödinger's equations replace Newton's laws in quantum mechanics.
Final Answer: \[ \boxed{\text{Schrödinger's equations}} \]