50. Which type of wave travels faster through water than through air?
Answer: B
Sound waves travel faster through water than through air.
Sound waves are longitudinal waves that propagate through mediums by vibrating the particles in the medium. In water, sound waves travel approximately four times faster than they do in air due to the higher density and elasticity of water.
A) Radio waves
Radio waves are a type of electromagnetic radiation that travel at the speed of light in a vacuum, which is much faster than their speed in any medium, including air or water. Therefore, radio waves do not travel faster in water than in air.
B) Sound waves
Sound waves are indeed the correct answer as they travel significantly faster in water compared to air. This is attributed to the properties of water, which allows sound waves to transmit energy more efficiently due to closer particle proximity.
C) Gamma waves
Gamma waves, like radio waves, are a form of electromagnetic radiation. They travel at the speed of light in a vacuum and do not have a speed advantage in water compared to air, making this option incorrect.
D) Visible light waves
Visible light waves also travel as electromagnetic radiation and, while they do slow down when passing through water compared to air, they do not travel faster in water. Thus, this option is incorrect.
Conclusion
Sound waves are the only type of wave listed that travels faster through water than through air, due to the physical properties of the mediums involved. All other options, being forms of electromagnetic radiation, travel at the same speed in a vacuum and do not exhibit the same behavior as sound waves in different mediums.