Hey there!
We understand that those statements that are listed below are the statements that would analyze the diagram.
A. The angle of incidence is degrees.
B. The angle of reflection is degrees.
C. The angle of refraction is degrees.
Let's start out with the first one as listed.
A. The angle of incidence is degrees.
let's consider the incidence ray. We wonder, how many degrees would be this ray. At noted in the diagram above, it would be considered to be 40°.
How?
Both 50° and 50° are considered to be normal, right in the middle.
We do 40°+40°=80°+ (both 50° with are normal) 50°+50° = 180°.
Therefore, we get the gist of how this incidence would be 50°.
∡=50 degrees.
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B. The angle of reflection is degrees.
We see that both sides are equally measured. Both 50°+40°= 90°, as well for the other side. 50°+40°= 90. The reflection of this would be 90°.
∡90° degrees.
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C. The angle of refraction is degrees.
Refraction come from what refracts from the other side. In this case, we see that 20° would be your answer, because from this, as the diagram shows, we can see how 20° refracts straight from the 70° on the left.
∡20° degrees.
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