When an electron of an atom falls from a higher energy level to the ground state, the atom loses 9.4145 x 10-25 joules of energy. What is the wavelength of the radiation emitted as a result of this transition? (Planck's constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108m/s) ?
0.211 m
1.870 m
4.730 m
4.259 x 107 m
21.106 m
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