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### Hw problem 1.13

Posted: Sun Oct 04, 2015 8:40 pm
this question states: "use the Rydberg formula for atomic hydrogen to calculate the wavelength of radiation generated by the transition from n=4 to n=2."

I am not sure why the answer I am getting is a number to the power of negative 19 when the answer in the book is 486 nm.
thanks

### Re: Hw problem 1.13

Posted: Sun Oct 04, 2015 8:43 pm
It sounds like what you've calculated is the energy of the radiation emitted, while what the question asked for was the wavelength. You could use $\lambda=\frac{h*c}{E}$ or $\lambda=\frac{c}{\nu}$ to find the correct answer.

### Re: Hw problem 1.13

Posted: Tue Oct 13, 2015 7:01 pm
Also, you might have left your answer in meters which is why you have the negative exponent. Multiply your answer by 1.0x10^9, and that should get your answer to nanometers.