JEE Main 20199 Apr, Morning shiftPhysicsEasyAtoms and Nuclei183× since 2002
Taking 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 :
JEE Main 2019 · 9 Apr, Morning shift · Q5989