Answers:

  1. a) Answer to #1a

b) Answer to #1b
c) This is in the visible spectrum.
d)Answer to #1d

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  2. Answer to #5
  3. Answer to #6

Answer to #7
The color of light associated with 688 nm is red.

  1.  

Answer to #8

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Answer to #9
The color of light associated with 436 nm is violet.