Question

question 28 of 33
how do light waves differ from sound waves?
a. light waves are faster and require a medium.
b. light waves are slower and require a medium.
c. light waves are slower and do not require a medium.
d. light waves are faster and do not require a medium.

Explanation:

Light waves are electromagnetic waves and can travel through a vacuum, while sound waves are mechanical waves that need a medium (like air, water, or solids) to propagate. Also, light waves travel much faster than sound waves in the same medium. The speed of light in a vacuum is approximately $3\times10^{8}$ m/s, and the speed of sound in air is around 343 m/s at room - temperature.

Answer:

D. Light waves are faster and do not require a medium.