Question

what is one way that light waves differ from sound waves? (1 point)
light waves have all the same frequency.
light waves do not require a medium to propagate.
light waves travel by oscillation.
light waves transfer energy.

Explanation:

• Analyze each option:
• "Light waves have all the same frequency" is incorrect as light has a range of frequencies (e.g., different colors have different frequencies).
• "Light waves do not require a medium to propagate" is correct. Light is an electromagnetic wave and can travel through a vacuum (no medium), while sound is a mechanical wave that needs a medium (like air, water, solids) to travel.
• "Light waves travel by oscillation" is incorrect because both light (electromagnetic oscillations) and sound (mechanical oscillations) involve oscillation in their propagation, so this is not a difference.
• "Light waves transfer energy" is incorrect as both light and sound waves transfer energy, so this is not a difference.

Answer:

B. Light waves do not require a medium to propagate.