De-Broglie Hypothesis

Wave Mechanical Model OF Atom || De-Broglie's Hypothesis and de-Broglie's Wavelength || Davisson-Germer Experiment || Class Illustration with Short Tricks

Justification OF Quantization OF Angular Momentum using de-Broglie's Hypothesis || Heisenberg's Uncertainty Principles || Davisson-Germer Experiment

Statement -I : If the potential difference applied to an electron is made 4 times, the de-Broglie wavelenght assoiated is halved. (Initial kinetic energy of the electron was zero ). Statement -II : On making potential difference 4 times velocity is doubled and hence according to De -broglie hypothesis lambda is halved.

There are many scientific models proposed and failed . The orpuscular theory is an example of such case . The corpuscular theory given by Newton was later replaced by Huygen's wave theory of light . This was further replaced by Plank's quantum theory and finally by De-Broglie's hypothesis . Comment on the fact that despite failures in the above in the above theories, we stress on the study of all the above given theories .

Derive Bohr's quantisation condition for angular momentum of orbiting electron in hydrogen atom using De Broglie's hypothesis.

(a) State Bohr's postulate to define stable orbits in hydrogen atom. How does de Broglie's hypothesis explain the stability of these orbits ? (b) A hydrogen atom initially in the ground state absorbs a photon which excites it to then n = 4 level . Estimate the frequeny of the photon.

(a) Using de Broglie's hypothesis, explain with the help of a suitable diagram, Bolirs seconti pusitiaie of quantization of energy levels in a hydrogen atom. (b) The ground state energy of hydrogen atom is -13.6 eV. What are the kinetic and poientialenegies of the electron in this state?