Visible light ranges from (A)_________ to (B)_____________.
a. (A) 300nm, (B) 700nm
b. (A) 200nm, (B) 800nm
c. (A) 400nm, (B) 900nm
d. (A) 400nm, (B) 700nm
Answer: d. (A) 400nm, (B) 700nm
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