Question

which statement correctly expresses a difference between light waves and sound waves?
a. sound waves travel through matter, but light waves can travel through areas with no matter
b. light waves have measurable wavelengths, but sound waves do not.
c. light waves have a constant speed, but sound waves have different speeds in different materials.
d. sound waves transmit matter, but light waves transmit energy

Explanation:

• Sound waves are mechanical waves that require a medium (matter) to travel.
• Light waves are electromagnetic waves that can travel through a vacuum (no matter).
• Both sound and light waves transmit energy.
• Both sound and light waves have measurable wavelengths.
• Light waves do not have a constant speed (varies in different media), and sound waves have different speeds in different materials.

Answer:

A. Sound waves travel through matter, but light waves can travel through areas with no matter