Question
When an electron ____, it emits a photon of light.
Answer
When an electron falls from a higher-energy to a lower-energy orbit, it emits a photon of light.
This is light emission
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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.