An electron changes its position from orbit \[n=4\] to the orbit \[n=2\] of an atom. The wavelength of the emitted radiation?s is (R = Rydberg?s constant) [BHU 2004]

• A.            \[\frac{16}{R}\]        
• B.            \[\frac{16}{3R}\]
• C.            \[\frac{16}{5R}\]
• D.            \[\frac{16}{7R}\]