NEET Class neet Answered

According to Bohr's model, radius of n-th orbit of hydrogen atom is

where n is orbital quantum number , m is mass of electron, h is planck's constant , ε_o is permittivity of free space and e is charge on electron.

Hence n-th orbit is proportional to square of quantum number n

  .........................(1)

..............................(2)

if difference of (n+1)-th orbit and n-th orbit equals n-1)-th orbit radius , then we get from eqn.(1) and (2) ,

(n-1)² = (2n +1)

By solving above expression, we get n = 4