Bohr S Model Of Hydrogen Atom

Step 1: Understanding energy levels of hydrogen. The energy levels in hydrogen are given by the Bohr equation: where is the principal quantum number.
Step 2: Effect of electron beam energy. - The incident energy is 12.5 eV. - The ground state energy ( ) of hydrogen is eV. - The energy required to excite an electron to is: Energy difference: Since 12.5 eV is supplied, the electron can be excited up to .
Step 3: Possible transitions and spectral lines. The number of spectral lines emitted follows: For , possible transitions are: - - - Thus, the total spectral lines: Final Answer: