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¹ Lee, J.Y. (2013). “Private tutoring and its impact on students' academic achievement, formal schooling, and educational inequality in Korea.” Unpublished doctoral thesis. Columbia University.
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, contains what information about a particle in a quantum system?
. It has an energy equal to that of a photon with a wavelength of 
. What excited state is the proton in? (Remember, the first excited state is where 
since the ground state is 
).