A hydrogen atom emits light in an electronic transition going from n=4 to n=2 lower shell.
1.) What is the frequency of this light?
2.) What wavelength is this and what color will it appear to the eye?
(R = 2.18x10 -18 J; h = 6.63 x 10 -34 J•sec; c = 3.00x10 8 m/sec;1 nm = 10 -9 m)
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