If radio waves can travel through space, why can’t we hear sounds in space as well? All BUT ONE answer choice should help you explain.
A. Radio waves are electromagnetic waves and do not require a medium.
B. Sound waves are compression waves and require a medium.
C. Sound waves are transmitted via particles called photons.
D. Because space is relatively empty, sound waves have no way to travel.
The Correct Answer and Explanation is:
The correct answer is C. Sound waves are transmitted via particles called photons.
Explanation:
To understand why we can’t hear sounds in space, we need to differentiate between sound waves and radio waves.
A. Radio waves are electromagnetic waves and do not require a medium.
This statement is true. Radio waves, like all electromagnetic waves (which include light, microwaves, and X-rays), can travel through a vacuum because they do not rely on matter (air, water, etc.) to propagate. Instead, they oscillate electric and magnetic fields, allowing them to traverse the emptiness of space. This property enables radio waves to be used for communication over vast distances in space.
B. Sound waves are compression waves and require a medium.
This statement is also accurate. Sound is a mechanical wave, which means it is generated by vibrating objects that create compressions and rarefactions in a medium (such as air, water, or solid materials). For sound waves to travel, they need a medium to carry the vibrations from one particle to another. In the vacuum of space, where there are very few particles, there is no medium for sound waves to propagate.
C. Sound waves are transmitted via particles called photons.
This statement is incorrect. Photons are the fundamental particles of light and electromagnetic radiation, not sound waves. Sound is transmitted through mechanical vibrations in a medium, while photons are responsible for electromagnetic waves, including light. Thus, conflating the two leads to a misunderstanding of how sound and electromagnetic waves function.
D. Because space is relatively empty, sound waves have no way to travel.
This statement is true. The vast emptiness of space, characterized by a near-complete lack of matter, makes it impossible for sound waves to travel, as there are insufficient particles to transmit the vibrations.
In summary, while radio waves can travel through the vacuum of space, sound waves cannot due to their need for a medium and the incorrect association of sound with photons.