Respuesta :
Answer: the correct answer is it will decrease in speed.
Explanation:
There are 2 types of waves:
1. Longitudinal waves: These waves are the waves where the particles of the medium propagates in the direction of the wave. These waves requires a medium to travel. For Example: Sound Waves.
2. Transverse wave: These waves are the waves where the particles of the medium propagates perpendicular to the direction of the wave. These waves does not require a medium to travel. They can travel in vacuum also. For Example: Light waves.
Speed of light wave is constant in the vacuum which is [tex]3\times 10^8m/s[/tex] but its speed decreases as it enters a medium. And, here the light is entering a solid having certain refractive index, so the speed would decrease.
Hence, the correct answer is it will decrease in speed.