State de-Broglie hypothesis.

What is de Broglie hypothesis? What conclusion can be drawn from Davisson and Germer’s experiment?

(i) State Bohr's quantization condition for defining stationary orbits . How does de- Broglie hypothesis explain the stationary orbits ? (ii) find the relation beween the three wavelengths lambda_(1), lambda _(2) " and " lambda_(3) from the energy level diagram shown :

Choose the correct alternatives A. Ratio of de-Broglie wavelengths of proton and α-particle of same kinetic energy is 2L1 B. if neutron, α-particle and β-particle all are moving with same kinetic energy , β-particle has maximum de-Broglie wavelength C. de-Broglie hypothesis treats particles as waves D. de-Broglie hypothesis treats waves as made of particles

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

State Avogadro's hypothesis.

State Atomic hypothesis.

State how de-Broglie wavelength (lambda) of moving particles varies with their linear momentum (P).

If the kinetic energy of a moving particle is E , then the de-Broglie wavelength is

For particles having same K.E., the de-Broglie wavelength is

Which one of the following statements is not ture about de-Broglie waves ?