Answer:
The actual elevation angle is 12.87 degrees
Explanation:
In the attachment you can clearly see the situation. The angle of elevation as seen for the scuba diver is shown in magenta, we conclude that .
Using Snell's Law we can write:
,
Let's approximate the index of refraction of the air (medium 1 in the picture) to 1.
We thus have:
. Calling the actual angle of elevation, we get from the picture that
I'm assuming you may have a list? However the type of wave that can be seen is visible waves to the human eye, so V.
Answer is choice #3: Mechanical energy
Answer:
Isolated or Closed system, both are correct