One Shot Formulae on “Structure of Atom”-01

Wave Properties

Photoelectric Effect

(hnu = h{nu}_0 + {1 over 2} m_e V^2) ;
where (nu) = frequency of incident ray; (h{nu}_0 ) = (W_0) = Work Function, (m_e) = mass of electron, (V) = velocity of emitted electron

de Broglie Relation

(lambda = {h over mV} = {h over p})
where m is the mass of the particle, V is its velocity and h is planck’s constant

()

Heisenberg’s Uncertainty Principle

(Delta x times Delta p_x ge {h over 4 pi})
(Delta x times Delta V_x ge {h over 4 mpi})
where (Delta x ) is the uncertainty in position of the particle, (Delta p_x ) is the uncertainty in its momentum and (Delta V_x ) is the uncertainty in its velocity