frequencies is emitted by mercury atoms? please explain!!?

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Dsf S

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Most of the light emitted by excited mercury atoms has wavelengths of 185, 254, 365, 436, 546 and 615 nm. Which one of the following frequencies is emitted by mercury atoms?

a. 1.4 x 1014s-1

b. 4.1 x 1014s-1

c. 8.2 x 1014s-1

d. 8.2 x 1015s-1

e. 4.1 x 1015s-1
 
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