be focused into a straight line. lose energy and dissipate. change length and direction. reflect off the water's surface.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Light waves that cross from an air medium to a water medium will
Possibilities:
- be focused into a straight line.
- lose energy and dissipate.
- change length and direction.
- reflect off the water's surface.

change length and direction.