Question

Will be the longest wavelength line in balmer series of spectrum of hydrogen atom

Answer 1

Answer:

6561Å

Explanation:

Longest wavelength corresponds to minimum energy i.e 3→2 transition

Energy gap of 3 & 2 = 1.89eV

Wavelength =↓

$\frac{12400}{energy} angstrom$

solve further to get

wavelength= 6561Å