The visible spectrum of hydrogen can be described accurately with an empirical formula found by the Swiss teacher Johann Balmer in 1885. This formula, which gives the wavelength of a spectral line as a function of an integer quantity
, describes the spectrum known as the
Balmer series. By varying
, you can calculate the wavelength of all spectral lines.
Part A 

Find the minimum value of in the Balmer series for which the predicted wavelength is in the ultraviolet region of the spectrum. 
ANSWER:
 =  7 
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