vid 4 wave particle duality

Bohr's model

H atom only has certain allowed energy levels, can change only by absorbing or emitting a photon

bohr’s electron transition

electron can get excited to a higher energy state by absorbing the corresponding photon

bohr’s equation relating photon energy to electron

E_photon = h(nu) = hc/λ = ∆E = E_f - E_i (always a discrete value

absorption and emission

lower to higher and higher to lower, in form of photon whose energy = ∆ lower and higher energy levels

energy of an electron in orbit “n”

E = -2.18E-18 (Z²/n²)

size of ∆E _ as n increases

decreases

momentum of a photon

p = mu = E/c

deBroglie wavelength for matter

λ = h/p = h/mu

heisenberg’s uncertainty principle

∆x∆p ≥ h/4π

heisenberg UP meaning

precision of position and momentum have an inverse relationship and you can’t determine both precisely

sign of ∆E effects

if >0, nfinal > ninitial ; if <0, nf < ni

heisenberg’s UP implication about Bohr

orbits don’t exist and Bohr’s model DNE