Transverse waves form stationary waves via interference

Steps:

• Define transverse waves as those with particle vibrations perpendicular to energy propagation, including mechanical (e.g., strings) and electromagnetic types.
• Recall stationary waves form from superposition of two waves traveling in opposite directions with equal frequency and amplitude.
• Note all transverse waves, like ripples on water or light in cavities, can produce stationary waves under reflection conditions.
• Eliminate options by checking universal applicability to all transverse wave types.

Why C is correct:

• Stationary waves arise in all transverse waves through interference of oppositely propagating waves, as per the principle of superposition in wave mechanics.

Why the others are wrong:

• A: Vibrations in transverse waves are perpendicular, not parallel, to propagation direction.
• B: Implies possibility but not universality; C states all do form them definitively.
• D: Mechanical transverse waves require a medium and cannot travel through vacuum.

Final answer: C