C. change length and direction
Explanation:
The density of the material in which the light wave is travelling affects the speed of the wave. Different materials have different densities and they effect differently light waves which travel through them. Light waves may change direction at the boundary between two transparent materials, depending on material density. Density also impacts the speed of light. The denser the material, the slower light travels through it. The wavelength also decreases as light travels through the denser medium.
Answer:
The time taken is 84 seconds, please give the brainliest award would be much appreciated.
Mechanical Waves require a medium to travel through in order to transport their energy from one location to another.
Hoped this helped!
That's true. The mass of your body is like the money
in your pocket. It doesn't change, no matter where you
take it.
