Answer:
3.reflection is described as the reverting back of light or sound waves in the same medium when it falls on plane.
refraction means the shift in direction of the radio waves when it enters medium with deference density.
4.Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. ... The speed of sound is also affected by other factors such as humidity and air pressure.
