JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 9
question_answer
Taking the wavelength of first Balmer line in hydrogen spectrum (\[n=3\] to \[n=2\]) as \[660\text{ }nm,\] the wavelength (in nm) of the 2nd Balmer line (\[n=4\] to \[n=2\]) will be;