Question

In a stationary wave, all particles are

• A. At rest at the same time twice in every period of oscillation
• B. At rest at the same time only once in every period of oscillation
• C. Never at rest at the same time
• D. Never at rest at all

Answer 1

The correct option is A At rest at the same time twice in every period of oscillation

In a stationary wave, all particles are at rest at the same twice in every period of oscillation.

Hence, Option $A$ is correct.