Sapling Homework Question 6

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Shruti Kulkarni 2I
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Sapling Homework Question 6

Postby Shruti Kulkarni 2I » Sun Oct 18, 2020 7:43 pm

Hi! I'm having some trouble on Sapling Question 6.
The electron in a hydrogen atom is excited to the n=7 shell and emits electromagnetic radiation when returning to lower energy levels. Determine the number of spectral lines that could appear when this electron returns to the lower energy levels, as well as the wavelength range in nanometers.
I have found the lower value in the wavelength range but I cannot seem to find the upper value. Every time I compute it I get 93.1 nm which is marked as wrong. Could someone explain how to find the upper value?

Lea Chamoun 2J
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Re: Sapling Homework Question 6

Postby Lea Chamoun 2J » Mon Oct 19, 2020 8:56 am

You can use Rydberg's equation to find the wavelengths emitted during the lowest energy transition (7 to 6) and the highest energy transition (7 to 1). When you use Rydberg's equation, you will get the frequencies of the wavelengths. You can then use c=λv to find the wavelengths. Make sure to double check what you put as your upper and lower bounds when you type in the answer.

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