Question

plz answer me this chemistry question !
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Answer 1

this is from which chapter and which class? can you

Answer 2

Explanation:

$Wave \: length=\frac{speed \: of \: light}{frequency}$

$lemda=\frac{3 × 10^⁸}{3.69 × 10^¹⁴}$

$lemda=\frac{1 × 10^-⁶}{1.23}$

$lemda=\frac{10^-6}{1.23}$

$lemda=0.8130 × 10^-⁶ m$

$lemda=8130 × 10^-¹⁰ m$

$lemda=8130 A°$