A light wave moves from a medium where particles of matter are closely packed to a medium made of very little matter. How do you expect the light wave to travel differently?
The light will change wavelength and lose energy.
The wavelength will change along with the frequency.
The wave will move faster, increasing its speed.

Question

A light wave moves from a medium where particles of matter are closely packed to a medium made of very little matter. How do you expect the light wave to travel differently?
The light will change wavelength and lose energy.
The wavelength will change along with the frequency.
The wave will move faster, increasing its speed.

anonymous · Answer

its The wave will move faster, increasing its speed.