PhysicsEasy183×since 2002Q5989Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3 to n = 2) as 660 nm, the wavelength of the 2nd Balmer line (n = 4 to n = 2) will be :A642.7 nmB488.9 nmC889.2 nmD388.9 nmCheck answerSkip