# Joint Entrance Examination/2000 Screening/Q006 Bohr model of an atom applied to an atom with some hypothetical particle

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# Original Question by Dharav talk

Here's the question...
 Imagine an atom made up of proton and a hypothetical particle of double the mass of the electron but ha. ving the same charge as the electron. Apply the Bohr atom model and consider all possible transitions of this hypothetical particle to the first excited level. The longest wavelength photon that will be emitted has wavelength X (given in terms of the Rydberg constant R for the hydrogen atom) equal to (A) 9/5R (B) 36/5R (C) 18/5R (D) 4/R?JPosted by Dharav talk 11:40, 17 August 2009 (UTC)

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