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**Calculate the frequency, in hertz, of the photon that is emitted when a electron falls from level n = 10 to level n = 5 in the H atom.**

Enter a numeric answer only, no units.

Enter a numeric answer only, no units.

I tried asking in other places but ppl are so ambiguous about it.

:( please help me.

I used rydberg formula:

1/λ = RH ∙ (1/n₁² - 1/n₂²)

(RH rydberg constant for hydrogen, n₁ lower level, n₂ higher level)

Hence:

λ = 1/ [ 1.09678×10⁷m⁻¹ ∙ (1/5² - 1/10²) ] = 3.0392×10⁻⁶m

and then I converted to

**Hz = 9.89e14**but i still

**GOT IT wrong**:( Please help me someone!!!