Question
The ____ is the angle of incidence that offers an angle of reflection of exactly 90 degrees.
Answer
The critical angle is the angle of incidence that offers an angle of reflection of exactly 90 degrees.
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____ are physical quantities that have both magnitude and direction .
Vectors are physical quantities that have ____ .
____ are quantities that have only a magnitude .
Scalars are quantities that have ____.
For vector addition , use the ____.
For vector ____, use the tip-to-tail method, or you can break the vector into its component parts and use the Pythagorean Theorem.