Question

Sonar signals and infrared light are are used to send messages to submarines deep under water. If we compare the two signals, which statement describes a difference between the two?
Responses
A The sonar signal gets there faster and is clearer.The sonar signal gets there faster and is clearer.
B The infrared light gets there faster and is clearer.The infrared light gets there faster and is clearer.
C The sonar signal gets there faster but is more likely to get distorted.The sonar signal gets there faster but is more likely to get distorted.
D The infrared light gets there faster but is more likely to get distorted.

Answer 1

D

Infrared (an electromagnetic wave) travels much faster than sound, but water absorbs and scatters infrared strongly so the signal is more likely to be lost/distorted. Sound (sonar) is much slower but propagates farther and more reliably underwater.